<?xml version="1.0" encoding="US-ASCII" standalone="no"?>
    <!-- Field: Doc-Info; Name: Generator; Value: GoFiler Complete; Version: 6.5a -->
    <!-- Field: Doc-Info; Name: VendorURI; Value: https://www.novaworks.com -->
    <!-- Field: Doc-Info; Name: Status; Value: 0x00000000 -->
<link:linkbase xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xbrli="http://www.xbrl.org/2003/instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#Cover" roleURI="http://cycurion.com/role/Cover" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#BalanceSheets" roleURI="http://cycurion.com/role/BalanceSheets" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#BalanceSheetsParenthetical" roleURI="http://cycurion.com/role/BalanceSheetsParenthetical" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#StatementsOfOperationsAndComprehensiveLossincome" roleURI="http://cycurion.com/role/StatementsOfOperationsAndComprehensiveLossincome" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#StatementsOfChangesInStockholdersEquity" roleURI="http://cycurion.com/role/StatementsOfChangesInStockholdersEquity" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#StatementsOfCashFlows" roleURI="http://cycurion.com/role/StatementsOfCashFlows" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#OrganizationAndDescriptionOfBusiness" roleURI="http://cycurion.com/role/OrganizationAndDescriptionOfBusiness" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#SignificantAccountingPolicies" roleURI="http://cycurion.com/role/SignificantAccountingPolicies" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#RevenueRecognition" roleURI="http://cycurion.com/role/RevenueRecognition" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#AccountsReceivableNet" roleURI="http://cycurion.com/role/AccountsReceivableNet" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#PropertyAndEquipmentNet" roleURI="http://cycurion.com/role/PropertyAndEquipmentNet" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#SoftwareDevelopmentCosts" roleURI="http://cycurion.com/role/SoftwareDevelopmentCosts" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#IntangibleAssets" roleURI="http://cycurion.com/role/IntangibleAssets" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#BusinessCombination" roleURI="http://cycurion.com/role/BusinessCombination" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#Goodwill" roleURI="http://cycurion.com/role/Goodwill" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#BankLoans" roleURI="http://cycurion.com/role/BankLoans" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#LoansPayable" roleURI="http://cycurion.com/role/LoansPayable" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#ConvertibleNotes" roleURI="http://cycurion.com/role/ConvertibleNotes" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#PromissoryNotes" roleURI="http://cycurion.com/role/PromissoryNotes" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#SubordinatedConvertiblePromissoryNotes" roleURI="http://cycurion.com/role/SubordinatedConvertiblePromissoryNotes" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#FactoringLiability" roleURI="http://cycurion.com/role/FactoringLiability" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#SeriesConvertiblePreferredStock" roleURI="http://cycurion.com/role/SeriesConvertiblePreferredStock" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#Equity" roleURI="http://cycurion.com/role/Equity" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#ConcentrationsRisksAndUncertainties" roleURI="http://cycurion.com/role/ConcentrationsRisksAndUncertainties" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#FairValueDisclosures" roleURI="http://cycurion.com/role/FairValueDisclosures" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#RelatedPartyTransactions" roleURI="http://cycurion.com/role/RelatedPartyTransactions" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#EarningsPerShare" roleURI="http://cycurion.com/role/EarningsPerShare" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#CommitmentsAndContingencies" roleURI="http://cycurion.com/role/CommitmentsAndContingencies" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#SubsequentEvents" roleURI="http://cycurion.com/role/SubsequentEvents" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#SignificantAccountingPoliciesPolicies" roleURI="http://cycurion.com/role/SignificantAccountingPoliciesPolicies" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#RevenueRecognitionTables" roleURI="http://cycurion.com/role/RevenueRecognitionTables" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#AccountsReceivableNetTables" roleURI="http://cycurion.com/role/AccountsReceivableNetTables" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#PropertyAndEquipmentNetTables" roleURI="http://cycurion.com/role/PropertyAndEquipmentNetTables" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#SoftwareDevelopmentCostsTables" roleURI="http://cycurion.com/role/SoftwareDevelopmentCostsTables" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#IntangibleAssetsTables" roleURI="http://cycurion.com/role/IntangibleAssetsTables" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#BusinessCombinationTables" roleURI="http://cycurion.com/role/BusinessCombinationTables" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#GoodwillTables" roleURI="http://cycurion.com/role/GoodwillTables" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#LoansPayableTables" roleURI="http://cycurion.com/role/LoansPayableTables" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#ConvertibleNotesTables" roleURI="http://cycurion.com/role/ConvertibleNotesTables" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#PromissoryNotesTables" roleURI="http://cycurion.com/role/PromissoryNotesTables" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#EquityTables" roleURI="http://cycurion.com/role/EquityTables" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#ConcentrationsRisksAndUncertaintiesTables" roleURI="http://cycurion.com/role/ConcentrationsRisksAndUncertaintiesTables" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#FairValueDisclosuresTables" roleURI="http://cycurion.com/role/FairValueDisclosuresTables" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#RelatedPartyTransactionsTables" roleURI="http://cycurion.com/role/RelatedPartyTransactionsTables" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#EarningsPerShareTables" roleURI="http://cycurion.com/role/EarningsPerShareTables" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#OrganizationAndDescriptionOfBusinessDetailsNarrative" roleURI="http://cycurion.com/role/OrganizationAndDescriptionOfBusinessDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#SignificantAccountingPoliciesDetailsNarrative" roleURI="http://cycurion.com/role/SignificantAccountingPoliciesDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#ScheduleOfDisaggregatedRevenuesDetails" roleURI="http://cycurion.com/role/ScheduleOfDisaggregatedRevenuesDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#RevenueRecognitionDetailsNarrative" roleURI="http://cycurion.com/role/RevenueRecognitionDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#ScheduleOfAccountsReceivablesNetDetails" roleURI="http://cycurion.com/role/ScheduleOfAccountsReceivablesNetDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#AccountsReceivableNetDetailsNarrative" roleURI="http://cycurion.com/role/AccountsReceivableNetDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#ScheduleOfPropertyAndEquipmentNetDetails" roleURI="http://cycurion.com/role/ScheduleOfPropertyAndEquipmentNetDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#ScheduleOfSoftwareDevelopmentCostsDetails" roleURI="http://cycurion.com/role/ScheduleOfSoftwareDevelopmentCostsDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#SoftwareDevelopmentCostsDetailsNarrative" roleURI="http://cycurion.com/role/SoftwareDevelopmentCostsDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#ScheduleOfIntangibleAssetsNetDetails" roleURI="http://cycurion.com/role/ScheduleOfIntangibleAssetsNetDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#ScheduleOfIntangibleAssetAmortizationDetails" roleURI="http://cycurion.com/role/ScheduleOfIntangibleAssetAmortizationDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#ScheduleOfFairValueOfConsiderationTransferredAssetsAcquiredLiabilitiesAssumedDetails" roleURI="http://cycurion.com/role/ScheduleOfFairValueOfConsiderationTransferredAssetsAcquiredLiabilitiesAssumedDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#SchdeuleOfFairValueOfConsiderationTransferredAssetsAcquiredLiabilitiesAssumedDetailsParenthetical" roleURI="http://cycurion.com/role/SchdeuleOfFairValueOfConsiderationTransferredAssetsAcquiredLiabilitiesAssumedDetailsParenthetical" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#BusinessCombinationDetailsNarrative" roleURI="http://cycurion.com/role/BusinessCombinationDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#ScheduleOfGoodwillDetails" roleURI="http://cycurion.com/role/ScheduleOfGoodwillDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#GoodwillDetailsNarrative" roleURI="http://cycurion.com/role/GoodwillDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#BankLoansDetailsNarrative" roleURI="http://cycurion.com/role/BankLoansDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#ScheduleOfLoansPayableDetails" roleURI="http://cycurion.com/role/ScheduleOfLoansPayableDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#LoansPayableDetailsNarrative" roleURI="http://cycurion.com/role/LoansPayableDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#ScheduleOfConvertibleNotesDetails" roleURI="http://cycurion.com/role/ScheduleOfConvertibleNotesDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#ConvertibleNotesDetailsNarrative" roleURI="http://cycurion.com/role/ConvertibleNotesDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#ScheduleOfPromissoryNotesDetails" roleURI="http://cycurion.com/role/ScheduleOfPromissoryNotesDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#SubordinatedConvertiblePromissoryNotesDetailsNarrative" roleURI="http://cycurion.com/role/SubordinatedConvertiblePromissoryNotesDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#FactoringLiabilityDetailsNarrative" roleURI="http://cycurion.com/role/FactoringLiabilityDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#SeriesConvertiblePreferredStockDetailsNarrative" roleURI="http://cycurion.com/role/SeriesConvertiblePreferredStockDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#ScheduleOfWarrantsActivityDetails" roleURI="http://cycurion.com/role/ScheduleOfWarrantsActivityDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#ScheduleOfCommonStockSubjectToPossibleRedemptionDetails" roleURI="http://cycurion.com/role/ScheduleOfCommonStockSubjectToPossibleRedemptionDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#EquityDetailsNarrative" roleURI="http://cycurion.com/role/EquityDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#ScheduleOfConcentrationRisksDetails" roleURI="http://cycurion.com/role/ScheduleOfConcentrationRisksDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#ConcentrationsRisksAndUncertaintiesDetailsNarrative" roleURI="http://cycurion.com/role/ConcentrationsRisksAndUncertaintiesDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#ScheduleOfFinancialInstrumentsDetails" roleURI="http://cycurion.com/role/ScheduleOfFinancialInstrumentsDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#ScheduleOfRelatedPartyTransactionsDetails" roleURI="http://cycurion.com/role/ScheduleOfRelatedPartyTransactionsDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#RelatedPartyTransactionsDetailsNarrative" roleURI="http://cycurion.com/role/RelatedPartyTransactionsDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#ScheduleOfComponentsOfBasicAndDilutedEarningsPerShareDetails" roleURI="http://cycurion.com/role/ScheduleOfComponentsOfBasicAndDilutedEarningsPerShareDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#ScheduleOfDilutiveEffectOfSecuritiesExcludedFromDilutiveEpsDueToAnti-dilutiveEffectDetails" roleURI="http://cycurion.com/role/ScheduleOfDilutiveEffectOfSecuritiesExcludedFromDilutiveEpsDueToAnti-dilutiveEffectDetails" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#CommitmentsAndContingenciesDetailsNarrative" roleURI="http://cycurion.com/role/CommitmentsAndContingenciesDetailsNarrative" />
    <link:roleRef xlink:type="simple" xlink:href="cycu-20260331.xsd#SubsequentEventsDetailsNarrative" roleURI="http://cycurion.com/role/SubsequentEventsDetailsNarrative" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/Cover" xlink:title="00000001 - Document - Cover" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/BalanceSheets" xlink:title="00000002 - Statement - Consolidated Balance Sheets">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaapAssetsCurrent" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaapCashAndCashEquivalentsAtCarryingValue" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsCurrent" xlink:to="loc_us-gaapCashAndCashEquivalentsAtCarryingValue" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RestrictedCashCurrent" xlink:label="loc_us-gaapRestrictedCashCurrent" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsCurrent" xlink:to="loc_us-gaapRestrictedCashCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaapAccountsReceivableNetCurrent" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsCurrent" xlink:to="loc_us-gaapAccountsReceivableNetCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherReceivablesNetCurrent" xlink:label="loc_us-gaapOtherReceivablesNetCurrent" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsCurrent" xlink:to="loc_us-gaapOtherReceivablesNetCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="loc_us-gaapPrepaidExpenseAndOtherAssetsCurrent" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsCurrent" xlink:to="loc_us-gaapPrepaidExpenseAndOtherAssetsCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsNoncurrent" xlink:label="loc_us-gaapAssetsNoncurrent" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DepositAssets" xlink:label="loc_us-gaapDepositAssets" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsNoncurrent" xlink:to="loc_us-gaapDepositAssets" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaapPropertyPlantAndEquipmentNet" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsNoncurrent" xlink:to="loc_us-gaapPropertyPlantAndEquipmentNet" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CapitalizedComputerSoftwareNet" xlink:label="loc_us-gaapCapitalizedComputerSoftwareNet" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsNoncurrent" xlink:to="loc_us-gaapCapitalizedComputerSoftwareNet" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FiniteLivedIntangibleAssetsNet" xlink:label="loc_us-gaapFiniteLivedIntangibleAssetsNet" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsNoncurrent" xlink:to="loc_us-gaapFiniteLivedIntangibleAssetsNet" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_DepositsAssetsNoncurrent" xlink:label="loc_us-gaapDepositsAssetsNoncurrent" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsNoncurrent" xlink:to="loc_us-gaapDepositsAssetsNoncurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaapGoodwill" />
      <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsNoncurrent" xlink:to="loc_us-gaapGoodwill" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AssetsHeldInTrustNoncurrent" xlink:label="loc_us-gaapAssetsHeldInTrustNoncurrent" />
      <link:calculationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssetsNoncurrent" xlink:to="loc_us-gaapAssetsHeldInTrustNoncurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Assets" xlink:label="loc_us-gaapAssets" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssets" xlink:to="loc_us-gaapAssetsCurrent" xlink:type="arc" weight="1" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapAssets" xlink:to="loc_us-gaapAssetsNoncurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaapLiabilitiesCurrent" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LinesOfCreditCurrent" xlink:label="loc_us-gaapLinesOfCreditCurrent" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapLinesOfCreditCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cycu-20260331.xsd#CYCU_BankLoanCurrentPortion" xlink:label="loc_CYCUBankLoanCurrentPortion" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_CYCUBankLoanCurrentPortion" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LoansPayableCurrent" xlink:label="loc_us-gaapLoansPayableCurrent" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapLoansPayableCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cycu-20260331.xsd#CYCU_FactoringLiability" xlink:label="loc_CYCUFactoringLiability" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_CYCUFactoringLiability" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cycu-20260331.xsd#CYCU_SubordinatedConvertiblePromissoryNotes" xlink:label="loc_CYCUSubordinatedConvertiblePromissoryNotes" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_CYCUSubordinatedConvertiblePromissoryNotes" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ConvertibleNotesPayableCurrent" xlink:label="loc_us-gaapConvertibleNotesPayableCurrent" />
      <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapConvertibleNotesPayableCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNotesPayable" xlink:label="loc_us-gaapOtherNotesPayable" />
      <link:calculationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapOtherNotesPayable" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cycu-20260331.xsd#CYCU_LoansPayableRelatedParties" xlink:label="loc_CYCULoansPayableRelatedParties" />
      <link:calculationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_CYCULoansPayableRelatedParties" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccountsPayableCurrent" xlink:label="loc_us-gaapAccountsPayableCurrent" />
      <link:calculationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapAccountsPayableCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaapAccruedLiabilitiesCurrent" />
      <link:calculationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapAccruedLiabilitiesCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EmployeeRelatedLiabilitiesCurrent" xlink:label="loc_us-gaapEmployeeRelatedLiabilitiesCurrent" />
      <link:calculationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapEmployeeRelatedLiabilitiesCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestPayableCurrent" xlink:label="loc_us-gaapInterestPayableCurrent" />
      <link:calculationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapInterestPayableCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SalesAndExciseTaxPayableCurrent" xlink:label="loc_us-gaapSalesAndExciseTaxPayableCurrent" />
      <link:calculationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesCurrent" xlink:to="loc_us-gaapSalesAndExciseTaxPayableCurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesNoncurrent" xlink:label="loc_us-gaapLiabilitiesNoncurrent" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LongTermLoansPayable" xlink:label="loc_us-gaapLongTermLoansPayable" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesNoncurrent" xlink:to="loc_us-gaapLongTermLoansPayable" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cycu-20260331.xsd#CYCU_ConvertiblePreferredStockLiability" xlink:label="loc_CYCUConvertiblePreferredStockLiability" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesNoncurrent" xlink:to="loc_CYCUConvertiblePreferredStockLiability" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Liabilities" xlink:label="loc_us-gaapLiabilities" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilities" xlink:to="loc_us-gaapLiabilitiesCurrent" xlink:type="arc" weight="1" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilities" xlink:to="loc_us-gaapLiabilitiesNoncurrent" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquity" xlink:label="loc_us-gaapStockholdersEquity" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PreferredStockValue" xlink:label="loc_us-gaapPreferredStockValue" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquity" xlink:to="loc_us-gaapPreferredStockValue" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaapCommonStockValue" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquity" xlink:to="loc_us-gaapCommonStockValue" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="loc_us-gaapAdditionalPaidInCapital" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquity" xlink:to="loc_us-gaapAdditionalPaidInCapital" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaapRetainedEarningsAccumulatedDeficit" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquity" xlink:to="loc_us-gaapRetainedEarningsAccumulatedDeficit" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaapStockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:to="loc_us-gaapStockholdersEquity" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_MinorityInterest" xlink:label="loc_us-gaapMinorityInterest" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapStockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:to="loc_us-gaapMinorityInterest" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaapLiabilitiesAndStockholdersEquity" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesAndStockholdersEquity" xlink:to="loc_us-gaapLiabilities" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="loc_us-gaapCommitmentsAndContingencies" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesAndStockholdersEquity" xlink:to="loc_us-gaapCommitmentsAndContingencies" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_TemporaryEquityCarryingAmountAttributableToParent" xlink:label="loc_us-gaapTemporaryEquityCarryingAmountAttributableToParent" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesAndStockholdersEquity" xlink:to="loc_us-gaapTemporaryEquityCarryingAmountAttributableToParent" xlink:type="arc" weight="1" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesAndStockholdersEquity" xlink:to="loc_us-gaapStockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/BalanceSheetsParenthetical" xlink:title="00000003 - Statement - Consolidated Balance Sheets (Parenthetical)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/StatementsOfOperationsAndComprehensiveLossincome" xlink:title="00000004 - Statement - Consolidated Statements of Operations and Comprehensive (Loss)/Income">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GrossProfit" xlink:label="loc_us-gaapGrossProfit" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaapRevenueFromContractWithCustomerExcludingAssessedTax" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapGrossProfit" xlink:to="loc_us-gaapRevenueFromContractWithCustomerExcludingAssessedTax" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CostOfRevenue" xlink:label="loc_us-gaapCostOfRevenue" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapGrossProfit" xlink:to="loc_us-gaapCostOfRevenue" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingExpenses" xlink:label="loc_us-gaapOperatingExpenses" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_SellingGeneralAndAdministrativeExpense" xlink:label="loc_us-gaapSellingGeneralAndAdministrativeExpense" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingExpenses" xlink:to="loc_us-gaapSellingGeneralAndAdministrativeExpense" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="loc_us-gaapAllocatedShareBasedCompensationExpense" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingExpenses" xlink:to="loc_us-gaapAllocatedShareBasedCompensationExpense" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_BusinessCombinationIntegrationRelatedCosts" xlink:label="loc_us-gaapBusinessCombinationIntegrationRelatedCosts" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingExpenses" xlink:to="loc_us-gaapBusinessCombinationIntegrationRelatedCosts" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaapOperatingIncomeLoss" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingIncomeLoss" xlink:to="loc_us-gaapGrossProfit" xlink:type="arc" weight="1" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapOperatingIncomeLoss" xlink:to="loc_us-gaapOperatingExpenses" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="loc_us-gaapNonoperatingIncomeExpense" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InvestmentIncomeNonoperating" xlink:label="loc_us-gaapInvestmentIncomeNonoperating" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNonoperatingIncomeExpense" xlink:to="loc_us-gaapInvestmentIncomeNonoperating" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestExpenseNonoperating" xlink:label="loc_us-gaapInterestExpenseNonoperating" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNonoperatingIncomeExpense" xlink:to="loc_us-gaapInterestExpenseNonoperating" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:label="loc_us-gaapGainsLossesOnExtinguishmentOfDebt" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNonoperatingIncomeExpense" xlink:to="loc_us-gaapGainsLossesOnExtinguishmentOfDebt" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="loc_us-gaapOtherNonoperatingIncomeExpense" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNonoperatingIncomeExpense" xlink:to="loc_us-gaapOtherNonoperatingIncomeExpense" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:label="loc_us-gaapIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="loc_us-gaapOperatingIncomeLoss" xlink:type="arc" weight="1" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:to="loc_us-gaapNonoperatingIncomeExpense" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaapProfitLoss" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapProfitLoss" xlink:to="loc_us-gaapIncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaapIncomeTaxExpenseBenefit" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapProfitLoss" xlink:to="loc_us-gaapIncomeTaxExpenseBenefit" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaapNetIncomeLoss" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetIncomeLoss" xlink:to="loc_us-gaapProfitLoss" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:label="loc_us-gaapNetIncomeLossAttributableToNoncontrollingInterest" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetIncomeLoss" xlink:to="loc_us-gaapNetIncomeLossAttributableToNoncontrollingInterest" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaapComprehensiveIncomeNetOfTax" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapComprehensiveIncomeNetOfTax" xlink:to="loc_us-gaapNetIncomeLoss" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/StatementsOfChangesInStockholdersEquity" xlink:title="00000005 - Statement - Consolidated Statements of Changes In Stockholders&apos; Equity" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/StatementsOfCashFlows" xlink:title="00000006 - Statement - Consolidated Statements of Cash Flows">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaapProfitLoss" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapProfitLoss" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaapShareBasedCompensation" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapShareBasedCompensation" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cycu-20260331.xsd#CYCU_ShareBasedPaymentArrangementBusinessCombinationRelatedNoncashExpense" xlink:label="loc_CYCUShareBasedPaymentArrangementBusinessCombinationRelatedNoncashExpense" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_CYCUShareBasedPaymentArrangementBusinessCombinationRelatedNoncashExpense" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_AmortizationOfDebtDiscountPremium" xlink:label="loc_us-gaapAmortizationOfDebtDiscountPremium" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapAmortizationOfDebtDiscountPremium" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_Depreciation" xlink:label="loc_us-gaapDepreciation" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapDepreciation" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CapitalizedComputerSoftwareAmortization1" xlink:label="loc_us-gaapCapitalizedComputerSoftwareAmortization1" />
      <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapCapitalizedComputerSoftwareAmortization1" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_GainsLossesOnExtinguishmentOfDebt" xlink:label="loc_us-gaapGainsLossesOnExtinguishmentOfDebt" />
      <link:calculationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapGainsLossesOnExtinguishmentOfDebt" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FinanceLeaseInterestExpense" xlink:label="loc_us-gaapFinanceLeaseInterestExpense" />
      <link:calculationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapFinanceLeaseInterestExpense" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccountsAndOtherReceivables" xlink:label="loc_us-gaapIncreaseDecreaseInAccountsAndOtherReceivables" />
      <link:calculationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInAccountsAndOtherReceivables" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInPrepaidExpensesOther" xlink:label="loc_us-gaapIncreaseDecreaseInPrepaidExpensesOther" />
      <link:calculationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInPrepaidExpensesOther" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:label="loc_us-gaapIncreaseDecreaseInAccountsPayableAndAccruedLiabilities" />
      <link:calculationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInAccountsPayableAndAccruedLiabilities" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInEmployeeRelatedLiabilities" xlink:label="loc_us-gaapIncreaseDecreaseInEmployeeRelatedLiabilities" />
      <link:calculationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInEmployeeRelatedLiabilities" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_IncreaseDecreaseInInterestPayableNet" xlink:label="loc_us-gaapIncreaseDecreaseInInterestPayableNet" />
      <link:calculationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:to="loc_us-gaapIncreaseDecreaseInInterestPayableNet" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaapNetCashProvidedByUsedInInvestingActivities" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashAcquiredFromAcquisition" xlink:label="loc_us-gaapCashAcquiredFromAcquisition" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInInvestingActivities" xlink:to="loc_us-gaapCashAcquiredFromAcquisition" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cycu-20260331.xsd#CYCU_PaymentsForPromissoryNotes" xlink:label="loc_CYCUPaymentsForPromissoryNotes" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInInvestingActivities" xlink:to="loc_CYCUPaymentsForPromissoryNotes" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaapPaymentsToAcquirePropertyPlantAndEquipment" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInInvestingActivities" xlink:to="loc_us-gaapPaymentsToAcquirePropertyPlantAndEquipment" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="cycu-20260331.xsd#CYCU_CashWithdrawnFromTrustAccountInConnectionWithRedemption" xlink:label="loc_CYCUCashWithdrawnFromTrustAccountInConnectionWithRedemption" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInInvestingActivities" xlink:to="loc_CYCUCashWithdrawnFromTrustAccountInConnectionWithRedemption" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cycu-20260331.xsd#CYCU_ReleaseOfTrustAccountToCompanysBankAccount" xlink:label="loc_CYCUReleaseOfTrustAccountToCompanysBankAccount" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInInvestingActivities" xlink:to="loc_CYCUReleaseOfTrustAccountToCompanysBankAccount" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceOfWarrants" xlink:label="loc_us-gaapProceedsFromIssuanceOfWarrants" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapProceedsFromIssuanceOfWarrants" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="loc_us-gaapPaymentsForRepurchaseOfCommonStock" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapPaymentsForRepurchaseOfCommonStock" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromIssuanceOfPrivatePlacement" xlink:label="loc_us-gaapProceedsFromIssuanceOfPrivatePlacement" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapProceedsFromIssuanceOfPrivatePlacement" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromOtherEquity" xlink:label="loc_us-gaapProceedsFromOtherEquity" />
      <link:calculationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapProceedsFromOtherEquity" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromLinesOfCredit" xlink:label="loc_us-gaapProceedsFromLinesOfCredit" />
      <link:calculationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapProceedsFromLinesOfCredit" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RepaymentsOfLinesOfCredit" xlink:label="loc_us-gaapRepaymentsOfLinesOfCredit" />
      <link:calculationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapRepaymentsOfLinesOfCredit" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromBankDebt" xlink:label="loc_us-gaapProceedsFromBankDebt" />
      <link:calculationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapProceedsFromBankDebt" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RepaymentsOfBankDebt" xlink:label="loc_us-gaapRepaymentsOfBankDebt" />
      <link:calculationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapRepaymentsOfBankDebt" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="cycu-20260331.xsd#CYCU_RepaymentOfLoansPayable" xlink:label="loc_CYCURepaymentOfLoansPayable" />
      <link:calculationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_CYCURepaymentOfLoansPayable" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromConvertibleDebt" xlink:label="loc_us-gaapProceedsFromConvertibleDebt" />
      <link:calculationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapProceedsFromConvertibleDebt" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProceedsFromNotesPayable" xlink:label="loc_us-gaapProceedsFromNotesPayable" />
      <link:calculationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapProceedsFromNotesPayable" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_RepaymentsOfNotesPayable" xlink:label="loc_us-gaapRepaymentsOfNotesPayable" />
      <link:calculationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:to="loc_us-gaapRepaymentsOfNotesPayable" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:label="loc_us-gaapCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:to="loc_us-gaapNetCashProvidedByUsedInOperatingActivities" xlink:type="arc" weight="1" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:to="loc_us-gaapNetCashProvidedByUsedInInvestingActivities" xlink:type="arc" weight="1" />
      <link:calculationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect" xlink:to="loc_us-gaapNetCashProvidedByUsedInFinancingActivities" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/OrganizationAndDescriptionOfBusiness" xlink:title="999007 - Disclosure - ORGANIZATION AND DESCRIPTION OF BUSINESS" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/SignificantAccountingPolicies" xlink:title="999008 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/RevenueRecognition" xlink:title="999009 - Disclosure - REVENUE RECOGNITION" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/AccountsReceivableNet" xlink:title="999010 - Disclosure - ACCOUNTS RECEIVABLE, NET" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/PropertyAndEquipmentNet" xlink:title="999011 - Disclosure - PROPERTY AND EQUIPMENT, NET" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/SoftwareDevelopmentCosts" xlink:title="999012 - Disclosure - SOFTWARE DEVELOPMENT COSTS" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/IntangibleAssets" xlink:title="999013 - Disclosure - INTANGIBLE ASSETS" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/BusinessCombination" xlink:title="999014 - Disclosure - BUSINESS COMBINATION" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/Goodwill" xlink:title="999015 - Disclosure - GOODWILL" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/BankLoans" xlink:title="999016 - Disclosure - BANK LOANS" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/LoansPayable" xlink:title="999017 - Disclosure - LOANS PAYABLE" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/ConvertibleNotes" xlink:title="999018 - Disclosure - CONVERTIBLE NOTES" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/PromissoryNotes" xlink:title="999019 - Disclosure - PROMISSORY NOTES" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/SubordinatedConvertiblePromissoryNotes" xlink:title="999020 - Disclosure - SUBORDINATED CONVERTIBLE PROMISSORY NOTES" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/FactoringLiability" xlink:title="999021 - Disclosure - FACTORING LIABILITY" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/SeriesConvertiblePreferredStock" xlink:title="999022 - Disclosure - SERIES A CONVERTIBLE PREFERRED STOCK" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/Equity" xlink:title="999023 - Disclosure - EQUITY" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/ConcentrationsRisksAndUncertainties" xlink:title="999024 - Disclosure - CONCENTRATIONS, RISKS AND UNCERTAINTIES" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/FairValueDisclosures" xlink:title="999025 - Disclosure - FAIR VALUE DISCLOSURES" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/RelatedPartyTransactions" xlink:title="999026 - Disclosure - RELATED PARTY TRANSACTIONS" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/EarningsPerShare" xlink:title="999027 - Disclosure - EARNINGS PER SHARE" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/CommitmentsAndContingencies" xlink:title="999028 - Disclosure - COMMITMENTS AND CONTINGENCIES" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/SubsequentEvents" xlink:title="999029 - Disclosure - SUBSEQUENT EVENTS" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/SignificantAccountingPoliciesPolicies" xlink:title="999030 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES (Policies)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/RevenueRecognitionTables" xlink:title="999031 - Disclosure - REVENUE RECOGNITION (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/AccountsReceivableNetTables" xlink:title="999032 - Disclosure - ACCOUNTS RECEIVABLE, NET (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/PropertyAndEquipmentNetTables" xlink:title="999033 - Disclosure - PROPERTY AND EQUIPMENT, NET (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/SoftwareDevelopmentCostsTables" xlink:title="999034 - Disclosure - SOFTWARE DEVELOPMENT COSTS (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/IntangibleAssetsTables" xlink:title="999035 - Disclosure - INTANGIBLE ASSETS (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/BusinessCombinationTables" xlink:title="999036 - Disclosure - BUSINESS COMBINATION (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/GoodwillTables" xlink:title="999037 - Disclosure - GOODWILL (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/LoansPayableTables" xlink:title="999038 - Disclosure - LOANS PAYABLE (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/ConvertibleNotesTables" xlink:title="999039 - Disclosure - CONVERTIBLE NOTES (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/PromissoryNotesTables" xlink:title="999040 - Disclosure - PROMISSORY NOTES (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/EquityTables" xlink:title="999041 - Disclosure - EQUITY (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/ConcentrationsRisksAndUncertaintiesTables" xlink:title="999042 - Disclosure - CONCENTRATIONS, RISKS AND UNCERTAINTIES (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/FairValueDisclosuresTables" xlink:title="999043 - Disclosure - FAIR VALUE DISCLOSURES (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/RelatedPartyTransactionsTables" xlink:title="999044 - Disclosure - RELATED PARTY TRANSACTIONS (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/EarningsPerShareTables" xlink:title="999045 - Disclosure - EARNINGS PER SHARE (Tables)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/OrganizationAndDescriptionOfBusinessDetailsNarrative" xlink:title="999046 - Disclosure - ORGANIZATION AND DESCRIPTION OF BUSINESS (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/SignificantAccountingPoliciesDetailsNarrative" xlink:title="999047 - Disclosure - SIGNIFICANT ACCOUNTING POLICIES (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/ScheduleOfDisaggregatedRevenuesDetails" xlink:title="999048 - Disclosure - SCHEDULE OF DISAGGREGATED REVENUES (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/RevenueRecognitionDetailsNarrative" xlink:title="999049 - Disclosure - REVENUE RECOGNITION (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/ScheduleOfAccountsReceivablesNetDetails" xlink:title="999050 - Disclosure - SCHEDULE OF ACCOUNTS RECEIVABLES, NET (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/AccountsReceivableNetDetailsNarrative" xlink:title="999051 - Disclosure - ACCOUNTS RECEIVABLE, NET (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/ScheduleOfPropertyAndEquipmentNetDetails" xlink:title="999052 - Disclosure - SCHEDULE OF PROPERTY AND EQUIPMENT, NET (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/ScheduleOfSoftwareDevelopmentCostsDetails" xlink:title="999053 - Disclosure - SCHEDULE OF SOFTWARE DEVELOPMENT COSTS (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/SoftwareDevelopmentCostsDetailsNarrative" xlink:title="999054 - Disclosure - SOFTWARE DEVELOPMENT COSTS (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/ScheduleOfIntangibleAssetsNetDetails" xlink:title="999055 - Disclosure - SCHEDULE OF INTANGIBLE ASSETS, NET (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/ScheduleOfIntangibleAssetAmortizationDetails" xlink:title="999056 - Disclosure - SCHEDULE OF INTANGIBLE ASSET AMORTIZATION (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/ScheduleOfFairValueOfConsiderationTransferredAssetsAcquiredLiabilitiesAssumedDetails" xlink:title="999057 - Disclosure - SCHEDULE OF FAIR VALUE OF CONSIDERATION TRANSFERRED ASSETS ACQUIRED LIABILITIES ASSUMED (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/SchdeuleOfFairValueOfConsiderationTransferredAssetsAcquiredLiabilitiesAssumedDetailsParenthetical" xlink:title="999058 - Disclosure - SCHDEULE OF FAIR VALUE OF CONSIDERATION TRANSFERRED ASSETS ACQUIRED LIABILITIES ASSUMED (Details) (Parenthetical)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/BusinessCombinationDetailsNarrative" xlink:title="999059 - Disclosure - BUSINESS COMBINATION (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/ScheduleOfGoodwillDetails" xlink:title="999060 - Disclosure - SCHEDULE OF GOODWILL (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/GoodwillDetailsNarrative" xlink:title="999061 - Disclosure - GOODWILL (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/BankLoansDetailsNarrative" xlink:title="999062 - Disclosure - BANK LOANS (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/ScheduleOfLoansPayableDetails" xlink:title="999063 - Disclosure - SCHEDULE OF LOANS PAYABLE (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/LoansPayableDetailsNarrative" xlink:title="999064 - Disclosure - LOANS PAYABLE (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/ScheduleOfConvertibleNotesDetails" xlink:title="999065 - Disclosure - SCHEDULE OF CONVERTIBLE NOTES (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/ConvertibleNotesDetailsNarrative" xlink:title="999066 - Disclosure - CONVERTIBLE NOTES (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/ScheduleOfPromissoryNotesDetails" xlink:title="999067 - Disclosure - SCHEDULE OF PROMISSORY NOTES (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/SubordinatedConvertiblePromissoryNotesDetailsNarrative" xlink:title="999068 - Disclosure - SUBORDINATED CONVERTIBLE PROMISSORY NOTES (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/FactoringLiabilityDetailsNarrative" xlink:title="999069 - Disclosure - FACTORING LIABILITY (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/SeriesConvertiblePreferredStockDetailsNarrative" xlink:title="999070 - Disclosure - SERIES A CONVERTIBLE PREFERRED STOCK (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/ScheduleOfWarrantsActivityDetails" xlink:title="999071 - Disclosure - SCHEDULE OF WARRANTS ACTIVITY (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/ScheduleOfCommonStockSubjectToPossibleRedemptionDetails" xlink:title="999072 - Disclosure - SCHEDULE OF COMMON STOCK SUBJECT TO POSSIBLE REDEMPTION (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/EquityDetailsNarrative" xlink:title="999073 - Disclosure - EQUITY (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/ScheduleOfConcentrationRisksDetails" xlink:title="999074 - Disclosure - SCHEDULE OF CONCENTRATION RISKS (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/ConcentrationsRisksAndUncertaintiesDetailsNarrative" xlink:title="999075 - Disclosure - CONCENTRATIONS, RISKS AND UNCERTAINTIES (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/ScheduleOfFinancialInstrumentsDetails" xlink:title="999076 - Disclosure - SCHEDULE OF FINANCIAL INSTRUMENTS (Details)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_LiabilitiesFairValueDisclosure" xlink:label="loc_us-gaapLiabilitiesFairValueDisclosure" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations" xlink:label="loc_us-gaapFairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesFairValueDisclosure" xlink:to="loc_us-gaapFairValueLiabilitiesMeasuredOnRecurringBasisSubordinatedDebtObligations" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="cycu-20260331.xsd#CYCU_ConvertiblePreferredStockLiabilityFairValueDisclosure" xlink:label="loc_CYCUConvertiblePreferredStockLiabilityFairValueDisclosure" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapLiabilitiesFairValueDisclosure" xlink:to="loc_CYCUConvertiblePreferredStockLiabilityFairValueDisclosure" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_EquityFairValueDisclosure" xlink:label="loc_us-gaapEquityFairValueDisclosure" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_WarrantsAndRightsOutstanding" xlink:label="loc_us-gaapWarrantsAndRightsOutstanding" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapEquityFairValueDisclosure" xlink:to="loc_us-gaapWarrantsAndRightsOutstanding" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/ScheduleOfRelatedPartyTransactionsDetails" xlink:title="999077 - Disclosure - SCHEDULE OF RELATED PARTY TRANSACTIONS (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/RelatedPartyTransactionsDetailsNarrative" xlink:title="999078 - Disclosure - RELATED PARTY TRANSACTIONS (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/ScheduleOfComponentsOfBasicAndDilutedEarningsPerShareDetails" xlink:title="999079 - Disclosure - SCHEDULE OF COMPONENTS OF BASIC AND DILUTED EARNINGS PER SHARE (Details)">
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersBasic" xlink:label="loc_us-gaapNetIncomeLossAvailableToCommonStockholdersBasic" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_ProfitLoss" xlink:label="loc_us-gaapProfitLoss" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetIncomeLossAvailableToCommonStockholdersBasic" xlink:to="loc_us-gaapProfitLoss" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLossAttributableToNoncontrollingInterest" xlink:label="loc_us-gaapNetIncomeLossAttributableToNoncontrollingInterest" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetIncomeLossAvailableToCommonStockholdersBasic" xlink:to="loc_us-gaapNetIncomeLossAttributableToNoncontrollingInterest" xlink:type="arc" weight="-1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_NetIncomeLossAvailableToCommonStockholdersDiluted" xlink:label="loc_us-gaapNetIncomeLossAvailableToCommonStockholdersDiluted" />
      <link:calculationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetIncomeLossAvailableToCommonStockholdersDiluted" xlink:to="loc_us-gaapNetIncomeLossAvailableToCommonStockholdersBasic" xlink:type="arc" weight="1" />
      <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2026/elts/us-gaap-2026.xsd#us-gaap_InterestOnConvertibleDebtNetOfTax" xlink:label="loc_us-gaapInterestOnConvertibleDebtNetOfTax" />
      <link:calculationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaapNetIncomeLossAvailableToCommonStockholdersDiluted" xlink:to="loc_us-gaapInterestOnConvertibleDebtNetOfTax" xlink:type="arc" weight="1" />
    </link:calculationLink>
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/ScheduleOfDilutiveEffectOfSecuritiesExcludedFromDilutiveEpsDueToAnti-dilutiveEffectDetails" xlink:title="999080 - Disclosure - SCHEDULE OF DILUTIVE EFFECT OF SECURITIES EXCLUDED FROM DILUTIVE EPS DUE TO ANTI-DILUTIVE EFFECT (Details)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/CommitmentsAndContingenciesDetailsNarrative" xlink:title="999081 - Disclosure - COMMITMENTS AND CONTINGENCIES (Details Narrative)" />
    <link:calculationLink xlink:type="extended" xlink:role="http://cycurion.com/role/SubsequentEventsDetailsNarrative" xlink:title="999082 - Disclosure - SUBSEQUENT EVENTS (Details Narrative)" />
</link:linkbase>
