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  <xs:element id="jec_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEmployeeBenefitTrustCash" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedEmployeeBenefitTrustCash" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jec_CommittedAndUncommittedLetterOfCreditFacilityMember" abstract="true" name="CommittedAndUncommittedLetterOfCreditFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jec_JKCAustraliaLNGPtyLimitedMember" abstract="true" name="JKCAustraliaLNGPtyLimitedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jec_OtherInformationAboutReceivablesAbstract" abstract="true" name="OtherInformationAboutReceivablesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="jec_OperatingProfitMember" abstract="true" name="OperatingProfitMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jec_PAConsultingGroupLimitedMember" abstract="true" name="PAConsultingGroupLimitedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jec_FiniteLivedIntangibleAssetsAndLiabilitiesLineItems" abstract="true" name="FiniteLivedIntangibleAssetsAndLiabilitiesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="jec_LeaseAbandonmentMember" abstract="true" name="LeaseAbandonmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jec_ContractsAndBacklogIntangibleMember" abstract="true" name="ContractsAndBacklogIntangibleMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jec_KingstonPowerPlantOfTheTVASecondaryCaseNo313CV505TAVHBGMember" abstract="true" name="KingstonPowerPlantOfTheTVASecondaryCaseNo313CV505TAVHBGMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jec_DisposalGroupIncludingDiscontinuedOperationsAmortizationOfIntangibleAssets" abstract="false" name="DisposalGroupIncludingDiscontinuedOperationsAmortizationOfIntangibleAssets" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jec_UseOfEstimatesAndAssumptionsDisclosureTextBlock" abstract="false" name="UseOfEstimatesAndAssumptionsDisclosureTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="jec_WorleyStockMember" abstract="true" name="WorleyStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jec_OtherNonoperatingIncomeExpenseExcludingDisposalGroupNotDiscontinuedOperationGainLossOnDisposal" abstract="false" name="OtherNonoperatingIncomeExpenseExcludingDisposalGroupNotDiscontinuedOperationGainLossOnDisposal" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jec_BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentFairValue" abstract="false" name="BusinessCombinationProvisionalInformationInitialAccountingIncompleteAdjustmentFairValue" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jec_C3aiIncMember" abstract="true" name="C3aiIncMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jec_BusinessAcquisitionProFormaEarningsPerShareBasicAndDilutedAbstract" abstract="true" name="BusinessAcquisitionProFormaEarningsPerShareBasicAndDilutedAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="jec_SeniorNotesSeriesCDueMay2030Member" abstract="true" name="SeniorNotesSeriesCDueMay2030Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jec_A2021TermLoanFacilityMember" abstract="true" name="A2021TermLoanFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jec_LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" abstract="false" name="LesseeOperatingLeaseLiabilityToBePaidAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jec_BusinessAcquisitionsProFormaIncomeTaxExpenseBenefit" abstract="false" name="BusinessAcquisitionsProFormaIncomeTaxExpenseBenefit" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jec_BuildingsAndInfrastructureMember" abstract="true" name="BuildingsAndInfrastructureMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jec_DebtInstrumentPeriodicPaymentPrincipalPercentOfFaceAmountOfDebt" abstract="false" name="DebtInstrumentPeriodicPaymentPrincipalPercentOfFaceAmountOfDebt" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="jec_PAConsultingMember" abstract="true" name="PAConsultingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jec_ScheduleOfFiniteLivedIntangibleAssetsAndLiabilitiesTable" abstract="true" name="ScheduleOfFiniteLivedIntangibleAssetsAndLiabilitiesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="jec_NetIncomeLossExcludingPortionAttributableToNoncontrollingInterest" abstract="false" name="NetIncomeLossExcludingPortionAttributableToNoncontrollingInterest" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jec_AerospaceAndTechnologyMember" abstract="true" name="AerospaceAndTechnologyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jec_FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour" abstract="false" name="FiniteLivedIntangibleAssetExpectedAmortizationAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jec_WorleyParsonsLimitedECRBusinessMember" abstract="true" name="WorleyParsonsLimitedECRBusinessMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jec_GoodwillAdjustmentsDuringPeriod" abstract="false" name="GoodwillAdjustmentsDuringPeriod" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jec_CapitalStockAbstract" abstract="true" name="CapitalStockAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="jec_NetIncomeLossAttributableToRedeemableNoncontrollingInterestContinuingOperations" abstract="false" name="NetIncomeLossAttributableToRedeemableNoncontrollingInterestContinuingOperations" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jec_ExpectedPensionContributions" abstract="false" name="ExpectedPensionContributions" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jec_BusinessCombinationConsiderationTransferredInTheMoneyStockOptions" abstract="false" name="BusinessCombinationConsiderationTransferredInTheMoneyStockOptions" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jec_FiniteLivedIntangibleAssetsNetAcquiredAsPartOfBusinessCombination" abstract="false" name="FiniteLivedIntangibleAssetsNetAcquiredAsPartOfBusinessCombination" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jec_DefinedBenefitPlansCompanyCashContributionsTableTableTextBlock" abstract="false" name="DefinedBenefitPlansCompanyCashContributionsTableTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="jec_BusinessAcquisitionsOneTimeAcquisitionCosts" abstract="false" name="BusinessAcquisitionsOneTimeAcquisitionCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="jec_BlackLynxMember" abstract="true" name="BlackLynxMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jec_CustomerRelationshipsContractsAndBacklogAndTradeNamesMember" abstract="true" name="CustomerRelationshipsContractsAndBacklogAndTradeNamesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="jec_PeoplePlacesSolutionsMember" abstract="true" name="PeoplePlacesSolutionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
</xs:schema>
