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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019e473a-3c4a-7415-8b97-3a772511fcb3,g:9e32895e-e744-47f0-9ab0-09f7f4479370-->
<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:roleRef roleURI="http://www.amentum.com/role/Cover" xlink:type="simple" xlink:href="amtm-20260810.xsd#Cover"/>
  <link:presentationLink xlink:role="http://www.amentum.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_CoverAbstract_019e473a-3c4a-745e-bc3f-6dd80e479452" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CoverAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019e473a-3c4a-78a0-816b-996bcf3766c8" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentType"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e473a-3c4a-745e-bc3f-6dd80e479452" xlink:to="loc_dei_DocumentType_019e473a-3c4a-78a0-816b-996bcf3766c8" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019e473a-3c4a-7a9e-8c49-3a6e824d180b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentPeriodEndDate"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e473a-3c4a-745e-bc3f-6dd80e479452" xlink:to="loc_dei_DocumentPeriodEndDate_019e473a-3c4a-7a9e-8c49-3a6e824d180b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019e473a-3c4a-718f-9701-6ccc3dcc363e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityRegistrantName"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e473a-3c4a-745e-bc3f-6dd80e479452" xlink:to="loc_dei_EntityRegistrantName_019e473a-3c4a-718f-9701-6ccc3dcc363e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019e473a-3c4a-77a5-b4dd-67ed115697f9" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e473a-3c4a-745e-bc3f-6dd80e479452" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019e473a-3c4a-77a5-b4dd-67ed115697f9" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019e473a-3c4a-7477-9630-9355d2e996fa" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFileNumber"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e473a-3c4a-745e-bc3f-6dd80e479452" xlink:to="loc_dei_EntityFileNumber_019e473a-3c4a-7477-9630-9355d2e996fa" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019e473a-3c4a-76d7-9a7f-5832e7ca5d67" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e473a-3c4a-745e-bc3f-6dd80e479452" xlink:to="loc_dei_EntityTaxIdentificationNumber_019e473a-3c4a-76d7-9a7f-5832e7ca5d67" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019e473a-3c4a-785f-a607-55a115662ec1" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressAddressLine1"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e473a-3c4a-745e-bc3f-6dd80e479452" xlink:to="loc_dei_EntityAddressAddressLine1_019e473a-3c4a-785f-a607-55a115662ec1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine2_019e473a-3c4a-7fba-8e18-2fbde622c6ce" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressAddressLine2"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e473a-3c4a-745e-bc3f-6dd80e479452" xlink:to="loc_dei_EntityAddressAddressLine2_019e473a-3c4a-7fba-8e18-2fbde622c6ce" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019e473a-3c4a-73c0-9fa0-a0d88d99448a" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressCityOrTown"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e473a-3c4a-745e-bc3f-6dd80e479452" xlink:to="loc_dei_EntityAddressCityOrTown_019e473a-3c4a-73c0-9fa0-a0d88d99448a" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019e473a-3c4a-7e9d-80b4-e3b8fee4c5c4" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressStateOrProvince"/>
    <link:presentationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e473a-3c4a-745e-bc3f-6dd80e479452" xlink:to="loc_dei_EntityAddressStateOrProvince_019e473a-3c4a-7e9d-80b4-e3b8fee4c5c4" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019e473a-3c4a-7bf1-8b0a-29076c1a2256" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressPostalZipCode"/>
    <link:presentationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e473a-3c4a-745e-bc3f-6dd80e479452" xlink:to="loc_dei_EntityAddressPostalZipCode_019e473a-3c4a-7bf1-8b0a-29076c1a2256" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019e473a-3c4a-7b52-9c5b-3bd4f3d5a95f" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CityAreaCode"/>
    <link:presentationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e473a-3c4a-745e-bc3f-6dd80e479452" xlink:to="loc_dei_CityAreaCode_019e473a-3c4a-7b52-9c5b-3bd4f3d5a95f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019e473a-3c4a-7cad-9a64-b3defe083b88" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LocalPhoneNumber"/>
    <link:presentationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e473a-3c4a-745e-bc3f-6dd80e479452" xlink:to="loc_dei_LocalPhoneNumber_019e473a-3c4a-7cad-9a64-b3defe083b88" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_019e473a-3c4a-72a8-9024-60b4a57e53b4" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_WrittenCommunications"/>
    <link:presentationArc order="14" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e473a-3c4a-745e-bc3f-6dd80e479452" xlink:to="loc_dei_WrittenCommunications_019e473a-3c4a-72a8-9024-60b4a57e53b4" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_019e473a-3c4a-7c45-a52b-3095f30440cb" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SolicitingMaterial"/>
    <link:presentationArc order="15" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e473a-3c4a-745e-bc3f-6dd80e479452" xlink:to="loc_dei_SolicitingMaterial_019e473a-3c4a-7c45-a52b-3095f30440cb" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_019e473a-3c4a-71b5-ac5e-459709396958" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_PreCommencementTenderOffer"/>
    <link:presentationArc order="16" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e473a-3c4a-745e-bc3f-6dd80e479452" xlink:to="loc_dei_PreCommencementTenderOffer_019e473a-3c4a-71b5-ac5e-459709396958" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_019e473a-3c4a-7734-b90e-7f40541bd617" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:presentationArc order="17" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e473a-3c4a-745e-bc3f-6dd80e479452" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_019e473a-3c4a-7734-b90e-7f40541bd617" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019e473a-3c4a-7198-a683-90e06c49b43e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_Security12bTitle"/>
    <link:presentationArc order="18" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e473a-3c4a-745e-bc3f-6dd80e479452" xlink:to="loc_dei_Security12bTitle_019e473a-3c4a-7198-a683-90e06c49b43e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019e473a-3c4a-7f37-a213-878673bbe882" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_TradingSymbol"/>
    <link:presentationArc order="19" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e473a-3c4a-745e-bc3f-6dd80e479452" xlink:to="loc_dei_TradingSymbol_019e473a-3c4a-7f37-a213-878673bbe882" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019e473a-3c4a-7a8a-be5f-663c224d15ff" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SecurityExchangeName"/>
    <link:presentationArc order="20" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e473a-3c4a-745e-bc3f-6dd80e479452" xlink:to="loc_dei_SecurityExchangeName_019e473a-3c4a-7a8a-be5f-663c224d15ff" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019e473a-3c4a-72d0-92b7-5b063bac39c3" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:presentationArc order="21" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e473a-3c4a-745e-bc3f-6dd80e479452" xlink:to="loc_dei_EntityEmergingGrowthCompany_019e473a-3c4a-72d0-92b7-5b063bac39c3" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019e473a-3c4a-7190-a694-ecb0f87691f0" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCentralIndexKey"/>
    <link:presentationArc order="22" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e473a-3c4a-745e-bc3f-6dd80e479452" xlink:to="loc_dei_EntityCentralIndexKey_019e473a-3c4a-7190-a694-ecb0f87691f0" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019e473a-3c4a-7df1-b8cc-67d1a56e1a37" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_AmendmentFlag"/>
    <link:presentationArc order="23" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019e473a-3c4a-745e-bc3f-6dd80e479452" xlink:to="loc_dei_AmendmentFlag_019e473a-3c4a-7df1-b8cc-67d1a56e1a37" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
</link:linkbase>
