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  <xsd:element name="February2023Member" id="acm_February2023Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CreditAgreementMember" id="acm_CreditAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="SeniorNotes2027Member" id="acm_SeniorNotes2027Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LeaseDisclosureTextBlock" id="acm_LeaseDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DividendsDeclared" id="acm_DividendsDeclared" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="debit" xbrli:periodType="duration" />
  <xsd:element name="DividendsPaidPerShareInCash" id="acm_DividendsPaidPerShareInCash" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="OilAndGasConstructionBusinessMember" id="acm_OilAndGasConstructionBusinessMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OtherLongTermLiabilitiesMember" id="acm_OtherLongTermLiabilitiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ForeignMember" id="acm_ForeignMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PassedThroughCostInRevenueAndCost" id="acm_PassedThroughCostInRevenueAndCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="TradeReceivablesSoldNoFinancialAndLegalObligations" id="acm_TradeReceivablesSoldNoFinancialAndLegalObligations" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="StockIncentivePlan2020Member" id="acm_StockIncentivePlan2020Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="PerformanceEarningsProgramMember" id="acm_PerformanceEarningsProgramMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DeferredTaxAssetCapitalLossesMember" id="acm_DeferredTaxAssetCapitalLossesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DefinedBenefitAxis" id="acm_DefinedBenefitAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DefinedBenefitDomain" id="acm_DefinedBenefitDomain" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DefinedBenefitMember" id="acm_DefinedBenefitMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="SignificantAccountingPoliciesTable" id="acm_SignificantAccountingPoliciesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="SignificantAccountingPoliciesLineItems" id="acm_SignificantAccountingPoliciesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CapitalExpenditureDiscontinuedOperationsIncludingAdjustments" id="acm_CapitalExpenditureDiscontinuedOperationsIncludingAdjustments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ProjectCostLiabilityAmountLowerRangeLimit" id="acm_ProjectCostLiabilityAmountLowerRangeLimit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ProjectCostLiabilityAmountUpperRangeLimit" id="acm_ProjectCostLiabilityAmountUpperRangeLimit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DepartmentOfEnergyAndAmentumEnvironmentEnergyInc.Member" id="acm_DepartmentOfEnergyAndAmentumEnvironmentEnergyInc.Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AmentumEnvironmentEnergyInc.Member" id="acm_AmentumEnvironmentEnergyInc.Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TaskOrderDeactivationDemolitionAndRemovalServicesNewYorkMember" id="acm_TaskOrderDeactivationDemolitionAndRemovalServicesNewYorkMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="MontanaRefineryMember" id="acm_MontanaRefineryMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ContractsPaymentEntitlement" id="acm_ContractsPaymentEntitlement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="ContractConstructionLien" id="acm_ContractConstructionLien" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="AsiaAustraliaPacificMember" id="acm_AsiaAustraliaPacificMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="EuropeMiddleEastIndiaAfricaMember" id="acm_EuropeMiddleEastIndiaAfricaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsPerformanceEarningsProgram" id="acm_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsPerformanceEarningsProgram" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardWeightedAverageExercisePricePerformanceEarningsProgram" id="acm_ShareBasedCompensationArrangementByShareBasedPaymentAwardWeightedAverageExercisePricePerformanceEarningsProgram" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="NewRevolvingCreditFacilityMember" id="acm_NewRevolvingCreditFacilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DebtInstrumentFloorRate" id="acm_DebtInstrumentFloorRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="DebtInstrumentSpreadAdjustmentRate" id="acm_DebtInstrumentSpreadAdjustmentRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="NewTermLoanBFacilityMember" id="acm_NewTermLoanBFacilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NewTermLoanFacilityMember" id="acm_NewTermLoanFacilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="OtherFinancialsInformationTable" id="acm_OtherFinancialsInformationTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="OtherFinancialsInformationLineItems" id="acm_OtherFinancialsInformationLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="W.troyRuddMember" id="acm_W.troyRuddMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TradingArrangementExerciseOfStockOptionsMember" id="acm_TradingArrangementExerciseOfStockOptionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TradingArrangementCommonStockMember" id="acm_TradingArrangementCommonStockMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="InvestmentCommitmentRevolvingCreditFacility" id="acm_InvestmentCommitmentRevolvingCreditFacility" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="DefinedBenefitPlanDiversifiedAndOtherAssetsMember" id="acm_DefinedBenefitPlanDiversifiedAndOtherAssetsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DefinedBenefitPlanAbsoluteReturnFundMember" id="acm_DefinedBenefitPlanAbsoluteReturnFundMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DiscontinuedOperationNonCashGainLossOnDisposalOfDiscontinuedOperation" id="acm_DiscontinuedOperationNonCashGainLossOnDisposalOfDiscontinuedOperation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="CreditFacilityInvestmentMember" id="acm_CreditFacilityInvestmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetInterestEarned" id="acm_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetInterestEarned" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="EffectiveIncomeTaxRateReconciliationSaleOfInvestment" id="acm_EffectiveIncomeTaxRateReconciliationSaleOfInvestment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="EffectiveIncomeTaxRateReconciliationSaleOfInvestmentPercent" id="acm_EffectiveIncomeTaxRateReconciliationSaleOfInvestmentPercent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="IncreaseInIncomeTaxBenefitRelatedToStateIncomeTaxesDueToApportionmentFactor" id="acm_IncreaseInIncomeTaxBenefitRelatedToStateIncomeTaxesDueToApportionmentFactor" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="IncomeTaxExpenseRelatedToUncertainTaxPositionsPartiallyOffsetToIncomeTaxBenefit" id="acm_IncomeTaxExpenseRelatedToUncertainTaxPositionsPartiallyOffsetToIncomeTaxBenefit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DeferredTaxAssetReductionDueToSaleOfInvestments" id="acm_DeferredTaxAssetReductionDueToSaleOfInvestments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="DiscontinuedOperationsPaymentsToFundCreditFacilityToCounterParty" id="acm_DiscontinuedOperationsPaymentsToFundCreditFacilityToCounterParty" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="NewRevolvingCreditFacilityAndNewTermFacilityMember" id="acm_NewRevolvingCreditFacilityAndNewTermFacilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="EquityInvestmentsMember" id="acm_EquityInvestmentsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ForeignNetOperatingLossesAndCurrencyTranslationAdjustmentsMember" id="acm_ForeignNetOperatingLossesAndCurrencyTranslationAdjustmentsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="StateNetOperatingLossesAndCreditsMember" id="acm_StateNetOperatingLossesAndCreditsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RestructuringNonLaborMember" id="acm_RestructuringNonLaborMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="OperatingLossesAndOtherDeferredTaxAssetsMember" id="acm_OperatingLossesAndOtherDeferredTaxAssetsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ImpairmentChargeMember" id="acm_ImpairmentChargeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TradingArrangementVestingOfRestrictedStockAwardsMember" id="acm_TradingArrangementVestingOfRestrictedStockAwardsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TradingArrangementCommonStockAtTargetPerformanceMember" id="acm_TradingArrangementCommonStockAtTargetPerformanceMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DavidGanMember" id="acm_DavidGanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
</xsd:schema>
