<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019ff783-dfe8-7314-a08e-a9dff03f758f,g:54fe4b97-02bb-42db-b001-8192c7912dbd-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:arcroleRef arcroleURI="https://xbrl.org/2023/arcrole/summation-item" xlink:type="simple" xlink:href="https://www.xbrl.org/2023/calculation-1.1.xsd#summation-item"/>
  <link:roleRef roleURI="http://www.mrcy.com/role/ConsolidatedBalanceSheets" xlink:type="simple" xlink:href="mrcy-20260703.xsd#ConsolidatedBalanceSheets"/>
  <link:calculationLink xlink:role="http://www.mrcy.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_019ff783-e151-774a-87f5-8fba12f7a145" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsPayableCurrent_019ff783-e151-714f-b79d-327cdac9e6cf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsPayableCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019ff783-e151-774a-87f5-8fba12f7a145" xlink:to="loc_us-gaap_AccountsPayableCurrent_019ff783-e151-714f-b79d-327cdac9e6cf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_019ff783-e151-7a1f-9c7f-f366c90fee46" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccruedLiabilitiesCurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019ff783-e151-774a-87f5-8fba12f7a145" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_019ff783-e151-7a1f-9c7f-f366c90fee46" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mrcy_DueToFactoringLiability_019ff783-e151-711f-83d1-24dedc54846d" xlink:href="mrcy-20260703.xsd#mrcy_DueToFactoringLiability"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019ff783-e151-774a-87f5-8fba12f7a145" xlink:to="loc_mrcy_DueToFactoringLiability_019ff783-e151-711f-83d1-24dedc54846d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_019ff783-e151-75ba-af70-2c57e4f32aa1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019ff783-e151-774a-87f5-8fba12f7a145" xlink:to="loc_us-gaap_EmployeeRelatedLiabilitiesCurrent_019ff783-e151-75ba-af70-2c57e4f32aa1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019ffc45-6d6b-7b98-89ff-b6e54a436ab9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerLiabilityCurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_019ff783-e151-774a-87f5-8fba12f7a145" xlink:to="loc_us-gaap_ContractWithCustomerLiabilityCurrent_019ffc45-6d6b-7b98-89ff-b6e54a436ab9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_019ff783-e151-70ac-b589-51d68cfe4063" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsCurrent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019ff783-e151-7ebc-a787-bef7cf85dfb7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019ff783-e151-70ac-b589-51d68cfe4063" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_019ff783-e151-7ebc-a787-bef7cf85dfb7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidTaxes_019ff783-e151-756e-b598-c63c09a3ed24" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrepaidTaxes"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019ff783-e151-70ac-b589-51d68cfe4063" xlink:to="loc_us-gaap_PrepaidTaxes_019ff783-e151-756e-b598-c63c09a3ed24" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_019ff783-e151-7cdc-b7bc-018b357c2783" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsReceivableNetCurrent"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019ff783-e151-70ac-b589-51d68cfe4063" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_019ff783-e151-7cdc-b7bc-018b357c2783" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ContractWithCustomerAssetNetCurrent_019ff783-e151-7dde-bdb7-af4503ead7f9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ContractWithCustomerAssetNetCurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019ff783-e151-70ac-b589-51d68cfe4063" xlink:to="loc_us-gaap_ContractWithCustomerAssetNetCurrent_019ff783-e151-7dde-bdb7-af4503ead7f9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_019ff783-e151-7f76-9d09-b88b4c9c3e33" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryNet"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019ff783-e151-70ac-b589-51d68cfe4063" xlink:to="loc_us-gaap_InventoryNet_019ff783-e151-7f76-9d09-b88b4c9c3e33" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019ff783-e151-72eb-a996-97987c7336eb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_019ff783-e151-70ac-b589-51d68cfe4063" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_019ff783-e151-72eb-a996-97987c7336eb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019ff783-e151-7f65-a12a-99046fff29b8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Liabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesCurrent_019ff783-e151-7fd2-84ab-a80ce7ba6500" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019ff783-e151-7f65-a12a-99046fff29b8" xlink:to="loc_us-gaap_LiabilitiesCurrent_019ff783-e151-7fd2-84ab-a80ce7ba6500" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccruedIncomeTaxesNoncurrent_019ff783-e151-79cd-845a-0c1ca4df4320" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccruedIncomeTaxesNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019ff783-e151-7f65-a12a-99046fff29b8" xlink:to="loc_us-gaap_AccruedIncomeTaxesNoncurrent_019ff783-e151-79cd-845a-0c1ca4df4320" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SecuredLongTermDebt_019ff783-e151-7617-83e8-57083e23cfb2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SecuredLongTermDebt"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019ff783-e151-7f65-a12a-99046fff29b8" xlink:to="loc_us-gaap_SecuredLongTermDebt_019ff783-e151-7617-83e8-57083e23cfb2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_019ff783-e151-7666-8933-b0f90003bcc0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019ff783-e151-7f65-a12a-99046fff29b8" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_019ff783-e151-7666-8933-b0f90003bcc0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherLiabilitiesNoncurrent_019ff783-e151-7306-811a-644f03f28fe1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherLiabilitiesNoncurrent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Liabilities_019ff783-e151-7f65-a12a-99046fff29b8" xlink:to="loc_us-gaap_OtherLiabilitiesNoncurrent_019ff783-e151-7306-811a-644f03f28fe1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_019ff783-e151-75a8-ad6a-12d340c4a097" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAndStockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Liabilities_019ff783-e151-7fb9-9de1-ea5f3f0da39b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Liabilities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_019ff783-e151-75a8-ad6a-12d340c4a097" xlink:to="loc_us-gaap_Liabilities_019ff783-e151-7fb9-9de1-ea5f3f0da39b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommitmentsAndContingencies_019ff783-e151-7c56-90a9-cb68582c9672" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommitmentsAndContingencies"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_019ff783-e151-75a8-ad6a-12d340c4a097" xlink:to="loc_us-gaap_CommitmentsAndContingencies_019ff783-e151-7c56-90a9-cb68582c9672" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019ff783-e151-758e-bd85-6efee86590e3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_019ff783-e151-75a8-ad6a-12d340c4a097" xlink:to="loc_us-gaap_StockholdersEquity_019ff783-e151-758e-bd85-6efee86590e3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Assets_019ff783-e151-70fe-b0e4-0870c2c34d91" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Assets"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AssetsCurrent_019ff783-e151-7539-b987-56dc5dd258e1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019ff783-e151-70fe-b0e4-0870c2c34d91" xlink:to="loc_us-gaap_AssetsCurrent_019ff783-e151-7539-b987-56dc5dd258e1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019ff783-e151-7330-88e3-1abd674906fc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019ff783-e151-70fe-b0e4-0870c2c34d91" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_019ff783-e151-7330-88e3-1abd674906fc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Goodwill_019ff783-e151-711c-88f1-35aaaf50ecbc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Goodwill"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019ff783-e151-70fe-b0e4-0870c2c34d91" xlink:to="loc_us-gaap_Goodwill_019ff783-e151-711c-88f1-35aaaf50ecbc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019ff783-e151-7a1a-9e70-4e0abe52f588" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019ff783-e151-70fe-b0e4-0870c2c34d91" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_019ff783-e151-7a1a-9e70-4e0abe52f588" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_019ff783-e151-7258-a68f-3b783c14466d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseRightOfUseAsset"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019ff783-e151-70fe-b0e4-0870c2c34d91" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_019ff783-e151-7258-a68f-3b783c14466d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxAssetsNet_019ff783-e151-7b47-beb9-43846f85457a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredIncomeTaxAssetsNet"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019ff783-e151-70fe-b0e4-0870c2c34d91" xlink:to="loc_us-gaap_DeferredIncomeTaxAssetsNet_019ff783-e151-7b47-beb9-43846f85457a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_019ff783-e151-7661-ae1e-a2aff772df8a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherAssetsNoncurrent"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_019ff783-e151-70fe-b0e4-0870c2c34d91" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_019ff783-e151-7661-ae1e-a2aff772df8a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StockholdersEquity_019ff783-e151-721d-bfa3-f496fca4c6ec" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PreferredStockValue_019ff783-e151-72e2-ae6b-38ea46efbc46" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019ff783-e151-721d-bfa3-f496fca4c6ec" xlink:to="loc_us-gaap_PreferredStockValue_019ff783-e151-72e2-ae6b-38ea46efbc46" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CommonStockValue_019ff783-e151-789d-bb27-10bc3ce686b9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockValue"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019ff783-e151-721d-bfa3-f496fca4c6ec" xlink:to="loc_us-gaap_CommonStockValue_019ff783-e151-789d-bb27-10bc3ce686b9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AdditionalPaidInCapital_019ff783-e151-74ae-a345-5f98bc002e77" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapital"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019ff783-e151-721d-bfa3-f496fca4c6ec" xlink:to="loc_us-gaap_AdditionalPaidInCapital_019ff783-e151-74ae-a345-5f98bc002e77" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019ff783-e151-7f4c-857e-16d05326a7b5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsAccumulatedDeficit"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019ff783-e151-721d-bfa3-f496fca4c6ec" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_019ff783-e151-7f4c-857e-16d05326a7b5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019ff783-e151-7536-a51a-16cc7465555b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquity_019ff783-e151-721d-bfa3-f496fca4c6ec" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_019ff783-e151-7536-a51a-16cc7465555b" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mrcy.com/role/ConsolidatedStatementsOfOperationsAndComprehensiveIncome" xlink:type="simple" xlink:href="mrcy-20260703.xsd#ConsolidatedStatementsOfOperationsAndComprehensiveIncome"/>
  <link:calculationLink xlink:role="http://www.mrcy.com/role/ConsolidatedStatementsOfOperationsAndComprehensiveIncome" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019ff783-e151-7896-9594-1b5b1c663839" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019ff783-e151-722a-8842-3b450c6906b7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_019ff783-e151-7896-9594-1b5b1c663839" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019ff783-e151-722a-8842-3b450c6906b7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019ff783-e151-7ab3-83fb-6b6f78027566" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_019ff783-e151-7896-9594-1b5b1c663839" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_019ff783-e151-7ab3-83fb-6b6f78027566" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_019ff783-e151-7cc9-97a8-6049166c1f3c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GrossProfit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019ff783-e151-72de-81bc-218ef9d5e9cf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Revenues"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_019ff783-e151-7cc9-97a8-6049166c1f3c" xlink:to="loc_us-gaap_Revenues_019ff783-e151-72de-81bc-218ef9d5e9cf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CostOfRevenue_019ff783-e151-74de-a5c1-262b7a28018a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostOfRevenue"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_019ff783-e151-7cc9-97a8-6049166c1f3c" xlink:to="loc_us-gaap_CostOfRevenue_019ff783-e151-74de-a5c1-262b7a28018a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019ff783-e151-708a-add8-eee0db3c183b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax_019ff783-e151-7c67-8883-a976b46504ff" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019ff783-e151-708a-add8-eee0db3c183b" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax_019ff783-e151-7c67-8883-a976b46504ff" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_019ff783-e151-7b91-9c2d-6b2021f2c045" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019ff783-e151-708a-add8-eee0db3c183b" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax_019ff783-e151-7b91-9c2d-6b2021f2c045" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_019ff783-e151-7ec4-a7b1-fb8069c3018a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019ff783-e151-708a-add8-eee0db3c183b" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_019ff783-e151-7ec4-a7b1-fb8069c3018a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_019ff783-e151-7848-b353-d0809998df98" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ComprehensiveIncomeNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019ff783-e151-72d0-9ce8-0c535aef2be9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_019ff783-e151-7848-b353-d0809998df98" xlink:to="loc_us-gaap_NetIncomeLoss_019ff783-e151-72d0-9ce8-0c535aef2be9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019ff783-e151-7272-8095-f9862fb6188a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_019ff783-e151-7848-b353-d0809998df98" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent_019ff783-e151-7272-8095-f9862fb6188a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019ff783-e151-785b-808a-836a6d68f90c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_GrossProfit_019ff783-e151-7bb2-a175-0dadf11a0f0e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GrossProfit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_019ff783-e151-785b-808a-836a6d68f90c" xlink:to="loc_us-gaap_GrossProfit_019ff783-e151-7bb2-a175-0dadf11a0f0e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_019ff783-e151-7588-9876-6c83d74a5910" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingExpenses"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_019ff783-e151-785b-808a-836a6d68f90c" xlink:to="loc_us-gaap_OperatingExpenses_019ff783-e151-7588-9876-6c83d74a5910" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingExpenses_019ff783-e151-7b04-8c49-6b1df8733bf8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingExpenses"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019ff783-e151-730a-be21-96e67331c9d2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SellingGeneralAndAdministrativeExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_019ff783-e151-7b04-8c49-6b1df8733bf8" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_019ff783-e151-730a-be21-96e67331c9d2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_019ff783-e151-7f01-ad58-155e366af16a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ResearchAndDevelopmentExpense"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_019ff783-e151-7b04-8c49-6b1df8733bf8" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_019ff783-e151-7f01-ad58-155e366af16a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AmortizationOfIntangibleAssets_019ff783-e151-74ce-a929-c9544ac41f0a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AmortizationOfIntangibleAssets"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_019ff783-e151-7b04-8c49-6b1df8733bf8" xlink:to="loc_us-gaap_AmortizationOfIntangibleAssets_019ff783-e151-74ce-a929-c9544ac41f0a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mrcy_RestructuringChargesNet_019ff783-e151-721d-a2d1-867f1a1696da" xlink:href="mrcy-20260703.xsd#mrcy_RestructuringChargesNet"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_019ff783-e151-7b04-8c49-6b1df8733bf8" xlink:to="loc_mrcy_RestructuringChargesNet_019ff783-e151-721d-a2d1-867f1a1696da" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_019ff783-e151-7864-bfb3-d7263b8b04da" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationAcquisitionRelatedCosts"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_019ff783-e151-7b04-8c49-6b1df8733bf8" xlink:to="loc_us-gaap_BusinessCombinationAcquisitionRelatedCosts_019ff783-e151-7864-bfb3-d7263b8b04da" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019ff783-e151-7433-9a43-0ed70da8d97a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingIncomeLoss_019ff783-e151-7058-bbcd-b5d6c275a4b6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019ff783-e151-7433-9a43-0ed70da8d97a" xlink:to="loc_us-gaap_OperatingIncomeLoss_019ff783-e151-7058-bbcd-b5d6c275a4b6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InvestmentIncomeInterest_019ff783-e151-7ca6-bf2b-17b1bdcccc7c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentIncomeInterest"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019ff783-e151-7433-9a43-0ed70da8d97a" xlink:to="loc_us-gaap_InvestmentIncomeInterest_019ff783-e151-7ca6-bf2b-17b1bdcccc7c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InterestExpense_019ff783-e151-7146-ae66-920869e1e033" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpense"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019ff783-e151-7433-9a43-0ed70da8d97a" xlink:to="loc_us-gaap_InterestExpense_019ff783-e151-7146-ae66-920869e1e033" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNonoperatingIncomeExpense_019ff783-e151-7baf-a940-ef75e9d909ef" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNonoperatingIncomeExpense"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019ff783-e151-7433-9a43-0ed70da8d97a" xlink:to="loc_us-gaap_OtherNonoperatingIncomeExpense_019ff783-e151-7baf-a940-ef75e9d909ef" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mrcy.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="simple" xlink:href="mrcy-20260703.xsd#ConsolidatedStatementsOfCashFlows"/>
  <link:calculationLink xlink:role="http://www.mrcy.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ff783-e152-7a13-bf3a-0703ceb6afde" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetIncomeLoss_019ff783-e152-7282-b225-397f7902ea7f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ff783-e152-7a13-bf3a-0703ceb6afde" xlink:to="loc_us-gaap_NetIncomeLoss_019ff783-e152-7282-b225-397f7902ea7f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_019ff783-e152-7828-b951-ae9885279d07" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DepreciationDepletionAndAmortization"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ff783-e152-7a13-bf3a-0703ceb6afde" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_019ff783-e152-7828-b951-ae9885279d07" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ShareBasedCompensation_019ff783-e152-7049-a0b0-29be42b2760a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensation"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ff783-e152-7a13-bf3a-0703ceb6afde" xlink:to="loc_us-gaap_ShareBasedCompensation_019ff783-e152-7049-a0b0-29be42b2760a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProvisionForOtherCreditLosses_019ff783-e152-7edf-908c-077c27c9141e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProvisionForOtherCreditLosses"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ff783-e152-7a13-bf3a-0703ceb6afde" xlink:to="loc_us-gaap_ProvisionForOtherCreditLosses_019ff783-e152-7edf-908c-077c27c9141e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash_019ff783-e152-718f-96fa-9fa495b4f7b4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ff783-e152-7a13-bf3a-0703ceb6afde" xlink:to="loc_us-gaap_PensionAndOtherPostretirementBenefitsExpenseReversalOfExpenseNoncash_019ff783-e152-718f-96fa-9fa495b4f7b4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_019ff783-e152-7654-90e8-ad3b1f9667b3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ff783-e152-7a13-bf3a-0703ceb6afde" xlink:to="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_019ff783-e152-7654-90e8-ad3b1f9667b3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DerivativeGainLossOnDerivativeNet_019ff783-e152-7b58-aa91-ddf025441f78" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DerivativeGainLossOnDerivativeNet"/>
    <link:calculationArc order="7" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ff783-e152-7a13-bf3a-0703ceb6afde" xlink:to="loc_us-gaap_DerivativeGainLossOnDerivativeNet_019ff783-e152-7b58-aa91-ddf025441f78" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OtherNoncashIncomeExpense_019ff783-e152-7648-bbe9-d5eb723be7f1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNoncashIncomeExpense"/>
    <link:calculationArc order="8" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ff783-e152-7a13-bf3a-0703ceb6afde" xlink:to="loc_us-gaap_OtherNoncashIncomeExpense_019ff783-e152-7648-bbe9-d5eb723be7f1" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_019ff783-e152-7826-b490-26b609d44fe8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable"/>
    <link:calculationArc order="9" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ff783-e152-7a13-bf3a-0703ceb6afde" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_019ff783-e152-7826-b490-26b609d44fe8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_019ff783-e152-7e14-a969-e9497c850071" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInInventories"/>
    <link:calculationArc order="10" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ff783-e152-7a13-bf3a-0703ceb6afde" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_019ff783-e152-7e14-a969-e9497c850071" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidTaxes_019ff783-e152-7a87-b281-bb3cf40b8b43" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInPrepaidTaxes"/>
    <link:calculationArc order="11" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ff783-e152-7a13-bf3a-0703ceb6afde" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidTaxes_019ff783-e152-7a87-b281-bb3cf40b8b43" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_019ff783-e152-7acb-b931-27398dbac46e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets"/>
    <link:calculationArc order="12" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ff783-e152-7a13-bf3a-0703ceb6afde" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_019ff783-e152-7acb-b931-27398dbac46e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_019ff783-e152-7161-8d50-c3f825373140" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentAssets"/>
    <link:calculationArc order="13" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ff783-e152-7a13-bf3a-0703ceb6afde" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_019ff783-e152-7161-8d50-c3f825373140" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_019ff783-e152-7da3-bfda-a684fbc91fda" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities"/>
    <link:calculationArc order="14" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ff783-e152-7a13-bf3a-0703ceb6afde" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities_019ff783-e152-7da3-bfda-a684fbc91fda" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_019ff783-e152-7f00-89e0-b7882fd61664" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInContractWithCustomerLiability"/>
    <link:calculationArc order="15" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ff783-e152-7a13-bf3a-0703ceb6afde" xlink:to="loc_us-gaap_IncreaseDecreaseInContractWithCustomerLiability_019ff783-e152-7f00-89e0-b7882fd61664" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_019ff783-e152-73dd-b455-46e1e5b5b0ae" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable"/>
    <link:calculationArc order="16" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ff783-e152-7a13-bf3a-0703ceb6afde" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedIncomeTaxesPayable_019ff783-e152-73dd-b455-46e1e5b5b0ae" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_019ff783-e152-7fe6-a4ca-0b85afb5ad7f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities"/>
    <link:calculationArc order="17" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ff783-e152-7a13-bf3a-0703ceb6afde" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentLiabilities_019ff783-e152-7fe6-a4ca-0b85afb5ad7f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019ff783-e152-74b2-9273-274d02e8ef12" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ff783-e152-7e77-b461-f34aca8f67fe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019ff783-e152-74b2-9273-274d02e8ef12" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_019ff783-e152-7e77-b461-f34aca8f67fe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019ff783-e152-7d13-9a40-8c8efdbb9506" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019ff783-e152-74b2-9273-274d02e8ef12" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019ff783-e152-7d13-9a40-8c8efdbb9506" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019ff783-e152-7f90-b671-1ac4b5b8c033" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019ff783-e152-74b2-9273-274d02e8ef12" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019ff783-e152-7f90-b671-1ac4b5b8c033" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019ff783-e152-73b0-9587-757004e94fb5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_019ff783-e152-74b2-9273-274d02e8ef12" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_019ff783-e152-73b0-9587-757004e94fb5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019ff783-e152-7104-9f69-04958fd7b0d9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019ff783-e152-7b5b-b540-e54ee2bebc92" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019ff783-e152-7104-9f69-04958fd7b0d9" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_019ff783-e152-7b5b-b540-e54ee2bebc92" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_019ff783-e152-75cf-a6d9-64e8418f3461" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsForProceedsFromOtherInvestingActivities"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019ff783-e152-7104-9f69-04958fd7b0d9" xlink:to="loc_us-gaap_PaymentsForProceedsFromOtherInvestingActivities_019ff783-e152-75cf-a6d9-64e8418f3461" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromSaleOfProductiveAssets_019ff783-e152-7f95-afa2-80fe4e74df26" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromSaleOfProductiveAssets"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019ff783-e152-7104-9f69-04958fd7b0d9" xlink:to="loc_us-gaap_ProceedsFromSaleOfProductiveAssets_019ff783-e152-7f95-afa2-80fe4e74df26" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_019ff783-e152-79ac-abb7-db8a8ddb43d9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired"/>
    <link:calculationArc order="4" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_019ff783-e152-7104-9f69-04958fd7b0d9" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_019ff783-e152-79ac-abb7-db8a8ddb43d9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019ff783-e152-7b80-a821-9821e37af633" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_019ff783-e152-7efa-a847-9ed598651800" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromStockOptionsExercised"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019ff783-e152-7b80-a821-9821e37af633" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_019ff783-e152-7efa-a847-9ed598651800" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_019ff783-e152-7d62-8a00-602b405dfc2d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019ff783-e152-7b80-a821-9821e37af633" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_019ff783-e152-7d62-8a00-602b405dfc2d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_RepaymentsOfDebt_019ff783-e152-7e30-9342-650f059f4f8c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RepaymentsOfDebt"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019ff783-e152-7b80-a821-9821e37af633" xlink:to="loc_us-gaap_RepaymentsOfDebt_019ff783-e152-7e30-9342-650f059f4f8c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ProceedsFromIssuanceOfDebt_019ff783-e152-7e5a-818f-f8c4f0af530c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceOfDebt"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019ff783-e152-7b80-a821-9821e37af633" xlink:to="loc_us-gaap_ProceedsFromIssuanceOfDebt_019ff783-e152-7e5a-818f-f8c4f0af530c" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PaymentsOfFinancingCosts_019ff783-e152-737a-acee-94b32ba02c9e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsOfFinancingCosts"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_019ff783-e152-7b80-a821-9821e37af633" xlink:to="loc_us-gaap_PaymentsOfFinancingCosts_019ff783-e152-737a-acee-94b32ba02c9e" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mrcy.com/role/SummaryofSignificantAccountingPoliciesBasicandDilutedWeightedAverageSharesOutstandingDetail" xlink:type="simple" xlink:href="mrcy-20260703.xsd#SummaryofSignificantAccountingPoliciesBasicandDilutedWeightedAverageSharesOutstandingDetail"/>
  <link:calculationLink xlink:role="http://www.mrcy.com/role/SummaryofSignificantAccountingPoliciesBasicandDilutedWeightedAverageSharesOutstandingDetail" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019ff783-e152-76bf-be64-65d3472d2164" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019ff783-e152-718f-b8b3-ac519a8368de" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019ff783-e152-76bf-be64-65d3472d2164" xlink:to="loc_us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_019ff783-e152-718f-b8b3-ac519a8368de" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_019ff783-e152-7940-9489-a55f3d8e022b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_019ff783-e152-76bf-be64-65d3472d2164" xlink:to="loc_us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment_019ff783-e152-7940-9489-a55f3d8e022b" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mrcy.com/role/InventoryDetails" xlink:type="simple" xlink:href="mrcy-20260703.xsd#InventoryDetails"/>
  <link:calculationLink xlink:role="http://www.mrcy.com/role/InventoryDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryNet_019ff783-e20e-70e5-8261-89cb353fa7ab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryRawMaterialsNetOfReserves_019ff783-e20e-7153-a6bf-a56ecd5392ab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryRawMaterialsNetOfReserves"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_019ff783-e20e-70e5-8261-89cb353fa7ab" xlink:to="loc_us-gaap_InventoryRawMaterialsNetOfReserves_019ff783-e20e-7153-a6bf-a56ecd5392ab" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryWorkInProcessNetOfReserves_019ff783-e20e-7bd3-9b52-5da4380d399d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryWorkInProcessNetOfReserves"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_019ff783-e20e-70e5-8261-89cb353fa7ab" xlink:to="loc_us-gaap_InventoryWorkInProcessNetOfReserves_019ff783-e20e-7bd3-9b52-5da4380d399d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_019ff783-e20e-77d6-b6ee-94a7793b360c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InventoryFinishedGoodsNetOfReserves"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_019ff783-e20e-70e5-8261-89cb353fa7ab" xlink:to="loc_us-gaap_InventoryFinishedGoodsNetOfReserves_019ff783-e20e-77d6-b6ee-94a7793b360c" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mrcy.com/role/PropertyandEquipmentDetails" xlink:type="simple" xlink:href="mrcy-20260703.xsd#PropertyandEquipmentDetails"/>
  <link:calculationLink xlink:role="http://www.mrcy.com/role/PropertyandEquipmentDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_019ff783-e20e-782f-854f-c1180253b01b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_019ff783-e20e-7e00-ab57-1e11aa437609" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_019ff783-e20e-782f-854f-c1180253b01b" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_019ff783-e20e-7e00-ab57-1e11aa437609" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_019ff783-e20e-770c-94d7-ea2ad86df0c0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_019ff783-e20e-782f-854f-c1180253b01b" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_019ff783-e20e-770c-94d7-ea2ad86df0c0" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mrcy.com/role/IntangibleAssetsAcquiredIntangibleAssetsDetails" xlink:type="simple" xlink:href="mrcy-20260703.xsd#IntangibleAssetsAcquiredIntangibleAssetsDetails"/>
  <link:calculationLink xlink:role="http://www.mrcy.com/role/IntangibleAssetsAcquiredIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019ff783-e20e-79ea-a409-7973d06f55df" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019ff783-e20e-7e11-804b-5e5a259c2726" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019ff783-e20e-79ea-a409-7973d06f55df" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsGross_019ff783-e20e-7e11-804b-5e5a259c2726" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019ff783-e20e-7e93-959b-c6eec8ab506f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019ff783-e20e-79ea-a409-7973d06f55df" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization_019ff783-e20e-7e93-959b-c6eec8ab506f" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mrcy.com/role/IntangibleAssetsEstimatedFutureAmortizationExpenseforAcquiredIntangibleAssetsDetails" xlink:type="simple" xlink:href="mrcy-20260703.xsd#IntangibleAssetsEstimatedFutureAmortizationExpenseforAcquiredIntangibleAssetsDetails"/>
  <link:calculationLink xlink:role="http://www.mrcy.com/role/IntangibleAssetsEstimatedFutureAmortizationExpenseforAcquiredIntangibleAssetsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019ff783-e20e-7ed1-831e-b9353cfc1178" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_mrcy_FiniteLivedIntangibleAssetsIncludingResidualValue_019ff783-e20e-7d2b-9066-cb0d3184709b" xlink:href="mrcy-20260703.xsd#mrcy_FiniteLivedIntangibleAssetsIncludingResidualValue"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsNet_019ff783-e20e-7ed1-831e-b9353cfc1178" xlink:to="loc_mrcy_FiniteLivedIntangibleAssetsIncludingResidualValue_019ff783-e20e-7d2b-9066-cb0d3184709b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mrcy_FiniteLivedIntangibleAssetsIncludingResidualValue_019ff783-e20e-7927-ac31-fd1c9d0bf9b4" xlink:href="mrcy-20260703.xsd#mrcy_FiniteLivedIntangibleAssetsIncludingResidualValue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_019ff783-e20e-7b11-8735-04e9edd7d39f" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_mrcy_FiniteLivedIntangibleAssetsIncludingResidualValue_019ff783-e20e-7927-ac31-fd1c9d0bf9b4" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths_019ff783-e20e-7b11-8735-04e9edd7d39f" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_019ff783-e20e-7fbf-ae08-470b9b3646a5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_mrcy_FiniteLivedIntangibleAssetsIncludingResidualValue_019ff783-e20e-7927-ac31-fd1c9d0bf9b4" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_019ff783-e20e-7fbf-ae08-470b9b3646a5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_019ff783-e20e-7470-924a-0fdccf0c05c4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_mrcy_FiniteLivedIntangibleAssetsIncludingResidualValue_019ff783-e20e-7927-ac31-fd1c9d0bf9b4" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_019ff783-e20e-7470-924a-0fdccf0c05c4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_019ff783-e20e-7b33-9048-3272ef03a708" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_mrcy_FiniteLivedIntangibleAssetsIncludingResidualValue_019ff783-e20e-7927-ac31-fd1c9d0bf9b4" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_019ff783-e20e-7b33-9048-3272ef03a708" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_019ff783-e20e-797b-80bf-a34549795726" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_mrcy_FiniteLivedIntangibleAssetsIncludingResidualValue_019ff783-e20e-7927-ac31-fd1c9d0bf9b4" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_019ff783-e20e-797b-80bf-a34549795726" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_019ff783-e20e-7dd0-a0cf-87bf0f6d8680" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_mrcy_FiniteLivedIntangibleAssetsIncludingResidualValue_019ff783-e20e-7927-ac31-fd1c9d0bf9b4" xlink:to="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearFive_019ff783-e20e-7dd0-a0cf-87bf0f6d8680" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mrcy.com/role/LeasesSummaryofSupplementalBalanceSheetInformationDetails" xlink:type="simple" xlink:href="mrcy-20260703.xsd#LeasesSummaryofSupplementalBalanceSheetInformationDetails"/>
  <link:calculationLink xlink:role="http://www.mrcy.com/role/LeasesSummaryofSupplementalBalanceSheetInformationDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_019ff783-e20e-71d3-8d3c-e8a3fb86a7b7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityCurrent_019ff783-e20e-7b60-9400-9ab7bf6335cc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityCurrent"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeaseLiability_019ff783-e20e-71d3-8d3c-e8a3fb86a7b7" xlink:to="loc_us-gaap_OperatingLeaseLiabilityCurrent_019ff783-e20e-7b60-9400-9ab7bf6335cc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_019ff783-e20e-72bc-a124-173bd165a6f1" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiabilityNoncurrent"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingLeaseLiability_019ff783-e20e-71d3-8d3c-e8a3fb86a7b7" xlink:to="loc_us-gaap_OperatingLeaseLiabilityNoncurrent_019ff783-e20e-72bc-a124-173bd165a6f1" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mrcy.com/role/LeasesScheduleofOperatingLeaseMaturityDetails" xlink:type="simple" xlink:href="mrcy-20260703.xsd#LeasesScheduleofOperatingLeaseMaturityDetails"/>
  <link:calculationLink xlink:role="http://www.mrcy.com/role/LeasesScheduleofOperatingLeaseMaturityDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019ff783-e20e-7923-8474-c7108575d9dc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_019ff783-e20e-78ed-bb2c-cc428b447fb8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019ff783-e20e-7923-8474-c7108575d9dc" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_019ff783-e20e-78ed-bb2c-cc428b447fb8" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLeaseLiability_019ff783-e20e-72e8-8333-94c315fe8edb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLeaseLiability"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019ff783-e20e-7923-8474-c7108575d9dc" xlink:to="loc_us-gaap_OperatingLeaseLiability_019ff783-e20e-72e8-8333-94c315fe8edb" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mrcy.com/role/LeasesScheduleofOperatingLeaseMaturityDetails_1" xlink:type="simple" xlink:href="mrcy-20260703.xsd#LeasesScheduleofOperatingLeaseMaturityDetails_1"/>
  <link:calculationLink xlink:role="http://www.mrcy.com/role/LeasesScheduleofOperatingLeaseMaturityDetails_1" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019ff783-e20e-777d-a89a-8436908f065a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_019ff783-e20e-789a-86f8-23f13676ded5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019ff783-e20e-777d-a89a-8436908f065a" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_019ff783-e20e-789a-86f8-23f13676ded5" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_019ff783-e20e-703c-ba8f-7e7fb2bb173e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019ff783-e20e-777d-a89a-8436908f065a" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_019ff783-e20e-703c-ba8f-7e7fb2bb173e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_019ff783-e20e-7c12-b8be-222dfeb7db5b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019ff783-e20e-777d-a89a-8436908f065a" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_019ff783-e20e-7c12-b8be-222dfeb7db5b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_019ff783-e20e-7ecf-8e1e-19a032f66ae9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019ff783-e20e-777d-a89a-8436908f065a" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFour_019ff783-e20e-7ecf-8e1e-19a032f66ae9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_019ff783-e20e-7de3-abaf-ebff904ff5a7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019ff783-e20e-777d-a89a-8436908f065a" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearFive_019ff783-e20e-7de3-abaf-ebff904ff5a7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_019ff783-e20e-7254-b205-6001077ff018" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_019ff783-e20e-777d-a89a-8436908f065a" xlink:to="loc_us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive_019ff783-e20e-7254-b205-6001077ff018" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mrcy.com/role/IncomeTaxesComponentsofIncomeBeforeIncomeTaxesandIncomeTaxExpenseBenefitDetails" xlink:type="simple" xlink:href="mrcy-20260703.xsd#IncomeTaxesComponentsofIncomeBeforeIncomeTaxesandIncomeTaxExpenseBenefitDetails"/>
  <link:calculationLink xlink:role="http://www.mrcy.com/role/IncomeTaxesComponentsofIncomeBeforeIncomeTaxesandIncomeTaxExpenseBenefitDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019ff783-e20e-7bbc-8dd9-5d66c4c854fc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_019ff783-e20e-7a7a-8b79-94ad30c2a3eb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019ff783-e20e-7bbc-8dd9-5d66c4c854fc" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic_019ff783-e20e-7a7a-8b79-94ad30c2a3eb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_019ff783-e20e-7320-a9c9-7f54e7d7fd20" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest_019ff783-e20e-7bbc-8dd9-5d66c4c854fc" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign_019ff783-e20e-7320-a9c9-7f54e7d7fd20" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperations_019ff783-e20e-7011-8cce-53ca7f455282" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperations"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_019ff783-e20e-7628-b396-f23fd138aba6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CurrentStateAndLocalTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperations_019ff783-e20e-7011-8cce-53ca7f455282" xlink:to="loc_us-gaap_CurrentStateAndLocalTaxExpenseBenefit_019ff783-e20e-7628-b396-f23fd138aba6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_019ff783-e20e-7b15-b223-a5dce0cd53e7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperations_019ff783-e20e-7011-8cce-53ca7f455282" xlink:to="loc_us-gaap_DeferredStateAndLocalIncomeTaxExpenseBenefit_019ff783-e20e-7b15-b223-a5dce0cd53e7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations_019ff783-e20e-7fb6-8d42-27a6a00ab12b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentForeignTaxExpenseBenefit_019ff783-e20e-7abc-9404-596924df7590" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CurrentForeignTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations_019ff783-e20e-7fb6-8d42-27a6a00ab12b" xlink:to="loc_us-gaap_CurrentForeignTaxExpenseBenefit_019ff783-e20e-7abc-9404-596924df7590" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredForeignIncomeTaxExpenseBenefit_019ff783-e20e-766b-b8d6-179647adfdc7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredForeignIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations_019ff783-e20e-7fb6-8d42-27a6a00ab12b" xlink:to="loc_us-gaap_DeferredForeignIncomeTaxExpenseBenefit_019ff783-e20e-766b-b8d6-179647adfdc7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations_019ff783-e20e-76f1-a7da-32f0a04051d8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_CurrentFederalTaxExpenseBenefit_019ff783-e20e-7120-9a5e-f37534ac52cf" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CurrentFederalTaxExpenseBenefit"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations_019ff783-e20e-76f1-a7da-32f0a04051d8" xlink:to="loc_us-gaap_CurrentFederalTaxExpenseBenefit_019ff783-e20e-7120-9a5e-f37534ac52cf" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_019ff783-e20e-7f4e-9ebc-86e6ff91f290" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredFederalIncomeTaxExpenseBenefit"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations_019ff783-e20e-76f1-a7da-32f0a04051d8" xlink:to="loc_us-gaap_DeferredFederalIncomeTaxExpenseBenefit_019ff783-e20e-7f4e-9ebc-86e6ff91f290" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019ff783-e20e-7ae4-ba90-e78bd32f9d09" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations_019ff783-e20e-70b5-950a-5fa15621cbe4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019ff783-e20e-7ae4-ba90-e78bd32f9d09" xlink:to="loc_us-gaap_FederalIncomeTaxExpenseBenefitContinuingOperations_019ff783-e20e-70b5-950a-5fa15621cbe4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperations_019ff783-e20e-735e-9657-56bd161fbece" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperations"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019ff783-e20e-7ae4-ba90-e78bd32f9d09" xlink:to="loc_us-gaap_StateAndLocalIncomeTaxExpenseBenefitContinuingOperations_019ff783-e20e-735e-9657-56bd161fbece" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations_019ff783-e20e-7d6b-874d-cca6514d7691" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019ff783-e20e-7ae4-ba90-e78bd32f9d09" xlink:to="loc_us-gaap_ForeignIncomeTaxExpenseBenefitContinuingOperations_019ff783-e20e-7d6b-874d-cca6514d7691" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mrcy.com/role/IncomeTaxesScheduleofIncomeTaxesPaidDetails" xlink:type="simple" xlink:href="mrcy-20260703.xsd#IncomeTaxesScheduleofIncomeTaxesPaidDetails"/>
  <link:calculationLink xlink:role="http://www.mrcy.com/role/IncomeTaxesScheduleofIncomeTaxesPaidDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxesPaidNet_019ffb86-c070-704e-83f9-f9ad47d9915c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxesPaidNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPaidFederalAfterRefundReceived_019ffb86-c070-7aab-a7c5-99da47b43ff0" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxPaidFederalAfterRefundReceived"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxesPaidNet_019ffb86-c070-704e-83f9-f9ad47d9915c" xlink:to="loc_us-gaap_IncomeTaxPaidFederalAfterRefundReceived_019ffb86-c070-7aab-a7c5-99da47b43ff0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived_019ffb86-c070-7f6b-801d-54b5646926f2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxesPaidNet_019ffb86-c070-704e-83f9-f9ad47d9915c" xlink:to="loc_us-gaap_IncomeTaxPaidStateAndLocalAfterRefundReceived_019ffb86-c070-7f6b-801d-54b5646926f2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxPaidForeignAfterRefundReceived_019ffb86-c070-77bf-bcfb-dfc994901862" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxPaidForeignAfterRefundReceived"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxesPaidNet_019ffb86-c070-704e-83f9-f9ad47d9915c" xlink:to="loc_us-gaap_IncomeTaxPaidForeignAfterRefundReceived_019ffb86-c070-77bf-bcfb-dfc994901862" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mrcy.com/role/IncomeTaxesReconciliationBetweenStatutoryFederalIncomeTaxRateandEffectiveIncomeTaxRatefromContinuingOperationsCurrentYearDetails" xlink:type="simple" xlink:href="mrcy-20260703.xsd#IncomeTaxesReconciliationBetweenStatutoryFederalIncomeTaxRateandEffectiveIncomeTaxRatefromContinuingOperationsCurrentYearDetails"/>
  <link:calculationLink xlink:role="http://www.mrcy.com/role/IncomeTaxesReconciliationBetweenStatutoryFederalIncomeTaxRateandEffectiveIncomeTaxRatefromContinuingOperationsCurrentYearDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_019ffbae-204b-70c7-b3ec-2c3a6cdbcb5e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_019ffbae-204b-7d0a-bbdb-e32098df27ca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019ffbae-204b-70c7-b3ec-2c3a6cdbcb5e" xlink:to="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_019ffbae-204b-7d0a-bbdb-e32098df27ca" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_019ffbae-204b-7e05-8f77-c3a0cf61310d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019ffbae-204b-70c7-b3ec-2c3a6cdbcb5e" xlink:to="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_019ffbae-204b-7e05-8f77-c3a0cf61310d" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_019ffbae-204b-7cce-861b-d8852d6513b6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019ffbae-204b-70c7-b3ec-2c3a6cdbcb5e" xlink:to="loc_us-gaap_IncomeTaxReconciliationChangeInDeferredTaxAssetsValuationAllowance_019ffbae-204b-7cce-861b-d8852d6513b6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_019ffbae-204b-79d7-b95b-fc3e0fa84061" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019ffbae-204b-70c7-b3ec-2c3a6cdbcb5e" xlink:to="loc_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_019ffbae-204b-79d7-b95b-fc3e0fa84061" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxCreditsResearch_019ffbae-204b-7071-a751-b284b0ef2749" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxReconciliationTaxCreditsResearch"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019ffbae-204b-70c7-b3ec-2c3a6cdbcb5e" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxCreditsResearch_019ffbae-204b-7071-a751-b284b0ef2749" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost_019ffbae-204b-731a-a905-0550850d7d79" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019ffbae-204b-70c7-b3ec-2c3a6cdbcb5e" xlink:to="loc_us-gaap_IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost_019ffbae-204b-731a-a905-0550850d7d79" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mrcy_EffectiveIncomeTaxRateReconciliationExcessTaxBenefitsOnStockCompensationAmount_019ffbae-204b-732f-b1cb-d5094b40c8b0" xlink:href="mrcy-20260703.xsd#mrcy_EffectiveIncomeTaxRateReconciliationExcessTaxBenefitsOnStockCompensationAmount"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019ffbae-204b-70c7-b3ec-2c3a6cdbcb5e" xlink:to="loc_mrcy_EffectiveIncomeTaxRateReconciliationExcessTaxBenefitsOnStockCompensationAmount_019ffbae-204b-732f-b1cb-d5094b40c8b0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxContingencies_019ffbae-204b-7da7-8b7d-805787cde1be" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxReconciliationTaxContingencies"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019ffbae-204b-70c7-b3ec-2c3a6cdbcb5e" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxContingencies_019ffbae-204b-7da7-8b7d-805787cde1be" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_019ffbae-204b-74d1-af39-469f9297a608" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxReconciliationOtherAdjustments"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_019ffbae-204b-70c7-b3ec-2c3a6cdbcb5e" xlink:to="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_019ffbae-204b-74d1-af39-469f9297a608" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019ffc3c-ebb0-71e4-b5d2-6f81be610bfc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_019ffc3c-ebb0-763a-bc43-cf436f54d354" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019ffc3c-ebb0-71e4-b5d2-6f81be610bfc" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_019ffc3c-ebb0-763a-bc43-cf436f54d354" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_019ffc3c-ebb0-7b1a-becc-c9ce0eb17f62" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019ffc3c-ebb0-71e4-b5d2-6f81be610bfc" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_019ffc3c-ebb0-7b1a-becc-c9ce0eb17f62" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_019ffc3c-ebb0-7fcd-8e64-9dc251b1da6b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019ffc3c-ebb0-71e4-b5d2-6f81be610bfc" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_019ffc3c-ebb0-7fcd-8e64-9dc251b1da6b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_019ffc3c-ebb0-7af1-b7f8-64f505e1929a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019ffc3c-ebb0-71e4-b5d2-6f81be610bfc" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_019ffc3c-ebb0-7af1-b7f8-64f505e1929a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch_019ffc3c-ebb0-7c98-8245-f6311a50a26e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019ffc3c-ebb0-71e4-b5d2-6f81be610bfc" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch_019ffc3c-ebb0-7c98-8245-f6311a50a26e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost_019ffc3c-ebb0-7d1e-b1d2-9222a1ba959b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019ffc3c-ebb0-71e4-b5d2-6f81be610bfc" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost_019ffc3c-ebb0-7d1e-b1d2-9222a1ba959b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mrcy_EffectiveIncomeTaxRateReconciliationExcessTaxBenefitsOnStockCompensationPercent_019ffc3c-ebb0-7cec-a724-05e2fc1b6c1e" xlink:href="mrcy-20260703.xsd#mrcy_EffectiveIncomeTaxRateReconciliationExcessTaxBenefitsOnStockCompensationPercent"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019ffc3c-ebb0-71e4-b5d2-6f81be610bfc" xlink:to="loc_mrcy_EffectiveIncomeTaxRateReconciliationExcessTaxBenefitsOnStockCompensationPercent_019ffc3c-ebb0-7cec-a724-05e2fc1b6c1e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies_019ffc3c-ebb0-74fa-afe8-8f7f4cf14cad" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019ffc3c-ebb0-71e4-b5d2-6f81be610bfc" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxContingencies_019ffc3c-ebb0-74fa-afe8-8f7f4cf14cad" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_019ffc3c-ebb0-7182-a5b1-494a12cf935a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019ffc3c-ebb0-71e4-b5d2-6f81be610bfc" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_019ffc3c-ebb0-7182-a5b1-494a12cf935a" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mrcy.com/role/IncomeTaxesReconciliationBetweenStatutoryFederalIncomeTaxRateandEffectiveIncomeTaxRatefromContinuingOperationsPriorYearsDetails" xlink:type="simple" xlink:href="mrcy-20260703.xsd#IncomeTaxesReconciliationBetweenStatutoryFederalIncomeTaxRateandEffectiveIncomeTaxRatefromContinuingOperationsPriorYearsDetails"/>
  <link:calculationLink xlink:role="http://www.mrcy.com/role/IncomeTaxesReconciliationBetweenStatutoryFederalIncomeTaxRateandEffectiveIncomeTaxRatefromContinuingOperationsPriorYearsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019ffc3c-66dd-7bc4-a20f-206af5ffb2bd" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateContinuingOperations"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_019ffc3c-66de-7b12-b9da-3a87621a0f0a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019ffc3c-66dd-7bc4-a20f-206af5ffb2bd" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate_019ffc3c-66de-7b12-b9da-3a87621a0f0a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_019ffc3c-66de-79f0-914a-fd148e0cc330" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019ffc3c-66dd-7bc4-a20f-206af5ffb2bd" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes_019ffc3c-66de-79f0-914a-fd148e0cc330" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch_019ffc3c-66de-7bc7-b778-bd63488fddc6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019ffc3c-66dd-7bc4-a20f-206af5ffb2bd" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationTaxCreditsResearch_019ffc3c-66de-7bc7-b778-bd63488fddc6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes_019ffc3c-66de-7932-a070-1766a21cf847" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019ffc3c-66dd-7bc4-a20f-206af5ffb2bd" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationPriorYearIncomeTaxes_019ffc3c-66de-7932-a070-1766a21cf847" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mrcy_EffectiveIncomeTaxRateReconciliationExcessTaxBenefitsOnStockCompensationPercent_019ffc3c-66de-74d5-8288-e063d0488ff7" xlink:href="mrcy-20260703.xsd#mrcy_EffectiveIncomeTaxRateReconciliationExcessTaxBenefitsOnStockCompensationPercent"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019ffc3c-66dd-7bc4-a20f-206af5ffb2bd" xlink:to="loc_mrcy_EffectiveIncomeTaxRateReconciliationExcessTaxBenefitsOnStockCompensationPercent_019ffc3c-66de-74d5-8288-e063d0488ff7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_019ffc3c-66de-7670-99f5-151ae3e21bb4" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019ffc3c-66dd-7bc4-a20f-206af5ffb2bd" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential_019ffc3c-66de-7670-99f5-151ae3e21bb4" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost_019ffc3c-66de-7457-9da0-c27acdb55325" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019ffc3c-66dd-7bc4-a20f-206af5ffb2bd" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost_019ffc3c-66de-7457-9da0-c27acdb55325" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mrcy_EffectiveIncomeTaxRateReconciliationChangesInContingentConsiderationPercent_019ffc3c-66de-7739-a8d6-f679485bddcb" xlink:href="mrcy-20260703.xsd#mrcy_EffectiveIncomeTaxRateReconciliationChangesInContingentConsiderationPercent"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019ffc3c-66dd-7bc4-a20f-206af5ffb2bd" xlink:to="loc_mrcy_EffectiveIncomeTaxRateReconciliationChangesInContingentConsiderationPercent_019ffc3c-66de-7739-a8d6-f679485bddcb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_019ffc3c-66de-7574-85f3-c178a6a48336" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019ffc3c-66dd-7bc4-a20f-206af5ffb2bd" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance_019ffc3c-66de-7574-85f3-c178a6a48336" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationFdiiPercent_019ffc3c-66de-7cbe-bf6d-a53f536536de" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationFdiiPercent"/>
    <link:calculationArc order="10" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019ffc3c-66dd-7bc4-a20f-206af5ffb2bd" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationFdiiPercent_019ffc3c-66de-7cbe-bf6d-a53f536536de" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationGiltiPercent_019ffc3c-66de-75a6-a7d8-e9878e07a2b9" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationGiltiPercent"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019ffc3c-66dd-7bc4-a20f-206af5ffb2bd" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationGiltiPercent_019ffc3c-66de-75a6-a7d8-e9878e07a2b9" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_019ffc40-89c2-7e24-918e-eabed9364d9d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments"/>
    <link:calculationArc order="12" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_EffectiveIncomeTaxRateContinuingOperations_019ffc3c-66dd-7bc4-a20f-206af5ffb2bd" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationOtherAdjustments_019ffc40-89c2-7e24-918e-eabed9364d9d" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mrcy.com/role/IncomeTaxesComponentsofNetDeferredTaxAssetsLiabilitiesDetails" xlink:type="simple" xlink:href="mrcy-20260703.xsd#IncomeTaxesComponentsofNetDeferredTaxAssetsLiabilitiesDetails"/>
  <link:calculationLink xlink:role="http://www.mrcy.com/role/IncomeTaxesComponentsofNetDeferredTaxAssetsLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_019ff783-e20e-73dd-8adf-370ac68f693c" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxAssetsNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_019ff783-e20e-74b5-b3c1-cd29b1a2d61b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxAssetsGross"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_019ff783-e20e-73dd-8adf-370ac68f693c" xlink:to="loc_us-gaap_DeferredTaxAssetsGross_019ff783-e20e-74b5-b3c1-cd29b1a2d61b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsValuationAllowance_019ff783-e20e-7ac2-80bc-cf5188a489fe" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxAssetsValuationAllowance"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsNet_019ff783-e20e-73dd-8adf-370ac68f693c" xlink:to="loc_us-gaap_DeferredTaxAssetsValuationAllowance_019ff783-e20e-7ac2-80bc-cf5188a489fe" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_019ff783-e20e-7045-907e-90b276e17fdc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsNet_019ff783-e20e-7c16-9f2d-dca2efa76318" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxAssetsNet"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_019ff783-e20e-7045-907e-90b276e17fdc" xlink:to="loc_us-gaap_DeferredTaxAssetsNet_019ff783-e20e-7c16-9f2d-dca2efa76318" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_019ff783-e20e-7131-8ee3-b0f55c70590a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredIncomeTaxLiabilities"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_019ff783-e20e-7045-907e-90b276e17fdc" xlink:to="loc_us-gaap_DeferredIncomeTaxLiabilities_019ff783-e20e-7131-8ee3-b0f55c70590a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsGross_019ff783-e20e-7d3a-8360-6118a1fe384a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxAssetsGross"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsInProcessResearchAndDevelopment_019ff783-e20e-73b3-8420-148be1803dab" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxAssetsInProcessResearchAndDevelopment"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_019ff783-e20e-7d3a-8360-6118a1fe384a" xlink:to="loc_us-gaap_DeferredTaxAssetsInProcessResearchAndDevelopment_019ff783-e20e-73b3-8420-148be1803dab" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mrcy_DeferredTaxAssetsTaxDeferredExpenseReservesandAccrualsEmployeeCompensation_019ff783-e20e-78a2-85cb-7bc38e8158f0" xlink:href="mrcy-20260703.xsd#mrcy_DeferredTaxAssetsTaxDeferredExpenseReservesandAccrualsEmployeeCompensation"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_019ff783-e20e-7d3a-8360-6118a1fe384a" xlink:to="loc_mrcy_DeferredTaxAssetsTaxDeferredExpenseReservesandAccrualsEmployeeCompensation_019ff783-e20e-78a2-85cb-7bc38e8158f0" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsOther_019ff783-e20e-7a61-9f21-3c60beb1205a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxAssetsOther"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_019ff783-e20e-7d3a-8360-6118a1fe384a" xlink:to="loc_us-gaap_DeferredTaxAssetsOther_019ff783-e20e-7a61-9f21-3c60beb1205a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch_019ff783-e20e-7f7c-98a5-6865ebfbcd4a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_019ff783-e20e-7d3a-8360-6118a1fe384a" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxCreditCarryforwardsResearch_019ff783-e20e-7f7c-98a5-6865ebfbcd4a" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_019ff783-e20e-7c71-b479-717cb63bb8ad" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_019ff783-e20e-7d3a-8360-6118a1fe384a" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost_019ff783-e20e-7c71-b479-717cb63bb8ad" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign_019ff783-e20e-73df-893f-ddec0af5f471" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_019ff783-e20e-7d3a-8360-6118a1fe384a" xlink:to="loc_us-gaap_DeferredTaxAssetsOperatingLossCarryforwardsForeign_019ff783-e20e-73df-893f-ddec0af5f471" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsDeferredIncome_019ff783-e20e-7258-9d9b-31d975bc6cca" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxAssetsDeferredIncome"/>
    <link:calculationArc order="7" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_019ff783-e20e-7d3a-8360-6118a1fe384a" xlink:to="loc_us-gaap_DeferredTaxAssetsDeferredIncome_019ff783-e20e-7258-9d9b-31d975bc6cca" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetInterestCarryforward_019ff783-e20e-7ae4-85be-62ea6a17d40b" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxAssetInterestCarryforward"/>
    <link:calculationArc order="8" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_019ff783-e20e-7d3a-8360-6118a1fe384a" xlink:to="loc_us-gaap_DeferredTaxAssetInterestCarryforward_019ff783-e20e-7ae4-85be-62ea6a17d40b" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mrcy_DeferredTaxAssetsInventoryValuationAndReceivableAllowances_019ff783-e20e-7091-a88f-92e949fd2d68" xlink:href="mrcy-20260703.xsd#mrcy_DeferredTaxAssetsInventoryValuationAndReceivableAllowances"/>
    <link:calculationArc order="9" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_019ff783-e20e-7d3a-8360-6118a1fe384a" xlink:to="loc_mrcy_DeferredTaxAssetsInventoryValuationAndReceivableAllowances_019ff783-e20e-7091-a88f-92e949fd2d68" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpense_019ff783-e20e-76f0-9489-be42be7a44c3" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxAssetsTaxDeferredExpense"/>
    <link:calculationArc order="10" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_019ff783-e20e-7d3a-8360-6118a1fe384a" xlink:to="loc_us-gaap_DeferredTaxAssetsTaxDeferredExpense_019ff783-e20e-76f0-9489-be42be7a44c3" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_OperatingLossCarryforwards_019ff783-e20e-73f5-a31a-cb898363938e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingLossCarryforwards"/>
    <link:calculationArc order="11" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsGross_019ff783-e20e-7d3a-8360-6118a1fe384a" xlink:to="loc_us-gaap_OperatingLossCarryforwards_019ff783-e20e-73f5-a31a-cb898363938e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredIncomeTaxLiabilities_019ff783-e20e-74ab-809f-3e5e96b2f574" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredIncomeTaxLiabilities"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_019ff783-e20e-71d5-b49f-e93b7e896980" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_019ff783-e20e-74ab-809f-3e5e96b2f574" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesPropertyPlantAndEquipment_019ff783-e20e-71d5-b49f-e93b7e896980" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssets_019ff783-e20e-7cdb-9cb4-5ddd4a0813d2" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssets"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_019ff783-e20e-74ab-809f-3e5e96b2f574" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssets_019ff783-e20e-7cdb-9cb4-5ddd4a0813d2" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesLeasingArrangements_019ff783-e20e-7f4c-b425-07c934a1faee" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxLiabilitiesLeasingArrangements"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_019ff783-e20e-74ab-809f-3e5e96b2f574" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesLeasingArrangements_019ff783-e20e-7f4c-b425-07c934a1faee" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesOther_019ff783-e20e-7e3f-a6bd-b51023cdb84a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DeferredTaxLiabilitiesOther"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredIncomeTaxLiabilities_019ff783-e20e-74ab-809f-3e5e96b2f574" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesOther_019ff783-e20e-7e3f-a6bd-b51023cdb84a" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mrcy.com/role/EmployeeBenefitPlansScheduleofExpectedFuturePensionBenefitsDetails" xlink:type="simple" xlink:href="mrcy-20260703.xsd#EmployeeBenefitPlansScheduleofExpectedFuturePensionBenefitsDetails"/>
  <link:calculationLink xlink:role="http://www.mrcy.com/role/EmployeeBenefitPlansScheduleofExpectedFuturePensionBenefitsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_mrcy_DefinedBenefitPlanExpectedFutureBenefitPayments_019ff783-e20e-726d-bcbe-9cf5d761a20a" xlink:href="mrcy-20260703.xsd#mrcy_DefinedBenefitPlanExpectedFutureBenefitPayments"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_019ff783-e20e-7d57-94fb-d4b03206b23e" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_mrcy_DefinedBenefitPlanExpectedFutureBenefitPayments_019ff783-e20e-726d-bcbe-9cf5d761a20a" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths_019ff783-e20e-7d57-94fb-d4b03206b23e" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_019ff783-e20e-7d1a-a40b-052999cf1688" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_mrcy_DefinedBenefitPlanExpectedFutureBenefitPayments_019ff783-e20e-726d-bcbe-9cf5d761a20a" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearTwo_019ff783-e20e-7d1a-a40b-052999cf1688" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_019ff783-e20e-7413-8f18-04ecc99996ad" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree"/>
    <link:calculationArc order="3" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_mrcy_DefinedBenefitPlanExpectedFutureBenefitPayments_019ff783-e20e-726d-bcbe-9cf5d761a20a" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearThree_019ff783-e20e-7413-8f18-04ecc99996ad" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_019ff783-e20e-72f1-8041-b0bd260423da" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_mrcy_DefinedBenefitPlanExpectedFutureBenefitPayments_019ff783-e20e-726d-bcbe-9cf5d761a20a" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFour_019ff783-e20e-72f1-8041-b0bd260423da" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_019ff783-e20e-791e-bfdc-157da53e9efc" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive"/>
    <link:calculationArc order="5" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_mrcy_DefinedBenefitPlanExpectedFutureBenefitPayments_019ff783-e20e-726d-bcbe-9cf5d761a20a" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsYearFive_019ff783-e20e-791e-bfdc-157da53e9efc" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_019ff783-e20e-7cfc-994d-f4a28a4867e5" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter"/>
    <link:calculationArc order="6" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_mrcy_DefinedBenefitPlanExpectedFutureBenefitPayments_019ff783-e20e-726d-bcbe-9cf5d761a20a" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsFiveFiscalYearsThereafter_019ff783-e20e-7cfc-994d-f4a28a4867e5" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mrcy.com/role/EmployeeBenefitPlansScheduleofNetPeriodicBenefitCostDetails" xlink:type="simple" xlink:href="mrcy-20260703.xsd#EmployeeBenefitPlansScheduleofNetPeriodicBenefitCostDetails"/>
  <link:calculationLink xlink:role="http://www.mrcy.com/role/EmployeeBenefitPlansScheduleofNetPeriodicBenefitCostDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019ff783-e20e-70a8-8fb8-58411b609d62" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanServiceCost_019ff783-e20e-7d76-a07c-9e2dee0dc157" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanServiceCost"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019ff783-e20e-70a8-8fb8-58411b609d62" xlink:to="loc_us-gaap_DefinedBenefitPlanServiceCost_019ff783-e20e-7d76-a07c-9e2dee0dc157" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanInterestCost_019ff783-e20e-786f-87ef-64cad6d0ffdb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanInterestCost"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019ff783-e20e-70a8-8fb8-58411b609d62" xlink:to="loc_us-gaap_DefinedBenefitPlanInterestCost_019ff783-e20e-786f-87ef-64cad6d0ffdb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_019ff783-e20e-7ba1-a240-ada2ca5e4b76" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets"/>
    <link:calculationArc order="3" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019ff783-e20e-70a8-8fb8-58411b609d62" xlink:to="loc_us-gaap_DefinedBenefitPlanExpectedReturnOnPlanAssets_019ff783-e20e-7ba1-a240-ada2ca5e4b76" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_019ff783-e20e-7c67-9dbc-becad7c53fcb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit"/>
    <link:calculationArc order="4" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019ff783-e20e-70a8-8fb8-58411b609d62" xlink:to="loc_us-gaap_DefinedBenefitPlanAmortizationOfPriorServiceCostCredit_019ff783-e20e-7c67-9dbc-becad7c53fcb" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_019ff783-e20e-7477-ae2c-bb5dd85ce7d7" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1"/>
    <link:calculationArc order="5" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019ff783-e20e-70a8-8fb8-58411b609d62" xlink:to="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1_019ff783-e20e-7477-ae2c-bb5dd85ce7d7" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1_019ff783-e20e-7b11-89ad-9aa77fddfccb" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1"/>
    <link:calculationArc order="6" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanNetPeriodicBenefitCost_019ff783-e20e-70a8-8fb8-58411b609d62" xlink:to="loc_us-gaap_DefinedBenefitPlanRecognizedNetGainLossDueToSettlementsAndCurtailments1_019ff783-e20e-7b11-89ad-9aa77fddfccb" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mrcy.com/role/EmployeeBenefitPlansReconciliationofFundedStatusDetails" xlink:type="simple" xlink:href="mrcy-20260703.xsd#EmployeeBenefitPlansReconciliationofFundedStatusDetails"/>
  <link:calculationLink xlink:role="http://www.mrcy.com/role/EmployeeBenefitPlansReconciliationofFundedStatusDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_019ff783-e20e-759f-b899-23ae5bbbe68d" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanFundedStatusOfPlan"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanBenefitObligation_019ff783-e20e-71f3-be72-fac1f7bae2ea" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanBenefitObligation"/>
    <link:calculationArc order="1" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_019ff783-e20e-759f-b899-23ae5bbbe68d" xlink:to="loc_us-gaap_DefinedBenefitPlanBenefitObligation_019ff783-e20e-71f3-be72-fac1f7bae2ea" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_019ff783-e20e-7bac-a940-d80ef312d030" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DefinedBenefitPlanFairValueOfPlanAssets"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_DefinedBenefitPlanFundedStatusOfPlan_019ff783-e20e-759f-b899-23ae5bbbe68d" xlink:to="loc_us-gaap_DefinedBenefitPlanFairValueOfPlanAssets_019ff783-e20e-7bac-a940-d80ef312d030" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mrcy.com/role/StockBasedCompensationStockBasedCompensationExpensesDetails" xlink:type="simple" xlink:href="mrcy-20260703.xsd#StockBasedCompensationStockBasedCompensationExpensesDetails"/>
  <link:calculationLink xlink:role="http://www.mrcy.com/role/StockBasedCompensationStockBasedCompensationExpensesDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax_019ff783-e20e-74c4-833a-40d46df6756a" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_019ff783-e20e-70f3-9b50-156b0df6c9c6" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllocatedShareBasedCompensationExpense"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax_019ff783-e20e-74c4-833a-40d46df6756a" xlink:to="loc_us-gaap_AllocatedShareBasedCompensationExpense_019ff783-e20e-70f3-9b50-156b0df6c9c6" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_019ff783-e20e-7e55-a523-b181b67421a8" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense"/>
    <link:calculationArc order="2" weight="-1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_AllocatedShareBasedCompensationExpenseNetOfTax_019ff783-e20e-74c4-833a-40d46df6756a" xlink:to="loc_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_019ff783-e20e-7e55-a523-b181b67421a8" xlink:type="arc"/>
  </link:calculationLink>
  <link:roleRef roleURI="http://www.mrcy.com/role/OperatingSegmentGeographicInformationandSignificantCustomersGeographicDistributionofRevenuesandLongLivedAssetsfromContinuingOperationsDetails" xlink:type="simple" xlink:href="mrcy-20260703.xsd#OperatingSegmentGeographicInformationandSignificantCustomersGeographicDistributionofRevenuesandLongLivedAssetsfromContinuingOperationsDetails"/>
  <link:calculationLink xlink:role="http://www.mrcy.com/role/OperatingSegmentGeographicInformationandSignificantCustomersGeographicDistributionofRevenuesandLongLivedAssetsfromContinuingOperationsDetails" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_us-gaap_Revenues_019ff783-e20e-7ce4-8922-41f859a05571" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Revenues"/>
    <link:loc xlink:type="locator" xlink:label="loc_mrcy_EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributedToIndividualForeignCountries_019ff783-e20e-7ba3-a013-ff1e33296827" xlink:href="mrcy-20260703.xsd#mrcy_EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributedToIndividualForeignCountries"/>
    <link:calculationArc order="1" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_019ff783-e20e-7ce4-8922-41f859a05571" xlink:to="loc_mrcy_EntityWideDisclosureOnGeographicAreasRevenueFromExternalCustomersAttributedToIndividualForeignCountries_019ff783-e20e-7ba3-a013-ff1e33296827" xlink:type="arc"/>
    <link:loc xlink:type="locator" xlink:label="loc_mrcy_RevenuesFromTransactionsWithOtherGeographicLocationsOfSameEntity_019ff783-e20e-7071-895f-155d45efa495" xlink:href="mrcy-20260703.xsd#mrcy_RevenuesFromTransactionsWithOtherGeographicLocationsOfSameEntity"/>
    <link:calculationArc order="2" weight="1.0" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_019ff783-e20e-7ce4-8922-41f859a05571" xlink:to="loc_mrcy_RevenuesFromTransactionsWithOtherGeographicLocationsOfSameEntity_019ff783-e20e-7071-895f-155d45efa495" xlink:type="arc"/>
  </link:calculationLink>
</link:linkbase>
