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  <xsd:element id="cece_MultiemployerPlanZoneByTypeDomain" name="MultiemployerPlanZoneByTypeDomain" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_DefinedBenefitAndContributionPlanDisclosureLineItems" name="DefinedBenefitAndContributionPlanDisclosureLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_DefinedBenefitPlansAndOtherPostretirementBenefitPlansLineItems" name="DefinedBenefitPlansAndOtherPostretirementBenefitPlansLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_FairValueOfFinancialInstrumentsLineItems" name="FairValueOfFinancialInstrumentsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_IncomeTaxesLineItems" name="IncomeTaxesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_NatureOfBusinessAndSummaryOfSignificantAccountingPoliciesLineItems" name="NatureOfBusinessAndSummaryOfSignificantAccountingPoliciesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_ScheduleOfGoodwillAndOtherIntangibleAssetsLineItems" name="ScheduleOfGoodwillAndOtherIntangibleAssetsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_ScheduleOfSummaryOfRestrictedStockUnitActivityLineItems" name="ScheduleOfSummaryOfRestrictedStockUnitActivityLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_AmendedAndRestatedCreditAgreementMember" name="AmendedAndRestatedCreditAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_BankGuaranteesMember" name="BankGuaranteesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_CECOGroupIncMember" name="CECOGroupIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_CertainTradeNamesMember" name="CertainTradeNamesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_ConsultingServicesMember" name="ConsultingServicesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_CorporateReconcilingItemsAndEliminationsMember" name="CorporateReconcilingItemsAndEliminationsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_CreditAgreementMember" name="CreditAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_CreditFacilityMember" name="CreditFacilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_CustomerListsAndTradeNameMember" name="CustomerListsAndTradeNameMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_DiscountRelatedToIssuanceOfDebtMember" name="DiscountRelatedToIssuanceOfDebtMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_EmployeeDeferralCategoryOneMember" name="EmployeeDeferralCategoryOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_EmployeeDeferralCategoryTwoMember" name="EmployeeDeferralCategoryTwoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_EnergyInterSegmentSalesMember" name="EnergyInterSegmentSalesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_EnergySolutionsAndIndustrialSolutionsSegmentsMember" name="EnergySolutionsAndIndustrialSolutionsSegmentsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_EnergySolutionsSegmentMember" name="EnergySolutionsSegmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_EngineeredSystemsMember" name="EngineeredSystemsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_EngineeredSystemsSegmentMember" name="EngineeredSystemsSegmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_EnvironmentalIntegratedSolutionsAndMaderHoldingsLPMember" name="EnvironmentalIntegratedSolutionsAndMaderHoldingsLPMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_EnvironmentalIntegratedSolutionsMember" name="EnvironmentalIntegratedSolutionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_EuroDenominatedBankGuaranteeMember" name="EuroDenominatedBankGuaranteeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_FederalFundsRateMember" name="FederalFundsRateMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_FluidHandlingFiltrationInterSegmentSalesMember" name="FluidHandlingFiltrationInterSegmentSalesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_FluidHandlingSolutionsMember" name="FluidHandlingSolutionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_FluidHandlingSolutionsSegmentMember" name="FluidHandlingSolutionsSegmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_ForeignCurrencyTranslationAdjustmentMember" name="ForeignCurrencyTranslationAdjustmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_GeneralRubberLlcMember" name="GeneralRubberLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_GreenZoneMember" name="GreenZoneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_IndustrialInterSegmentSalesMember" name="IndustrialInterSegmentSalesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_IndustrialProcessSolutionsMember" name="IndustrialProcessSolutionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_IndustrialSolutionsSegmentMember" name="IndustrialSolutionsSegmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_JiangyinZhongliIndustrialTechnologyCoLtdMember" name="JiangyinZhongliIndustrialTechnologyCoLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_JointVentureAgreementMember" name="JointVentureAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_KeystoneFilterBrandMember" name="KeystoneFilterBrandMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_MaderHoldingsLPMember" name="MaderHoldingsLPMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_MaderMachineCompanyMember" name="MaderMachineCompanyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_MiddleEastAndAfricaMember" name="MiddleEastAndAfricaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_NetherlandsFacilityMember" name="NetherlandsFacilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_NoSingleCustomerMember" name="NoSingleCustomerMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_OneMonthLiborMember" name="OneMonthLiborMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_RedZoneMember" name="RedZoneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_RelatedPartyOneMember" name="RelatedPartyOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_RestrictedStockAndPerformanceUnitsMember" name="RestrictedStockAndPerformanceUnitsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_SecondAmendedAndRestatedCreditAgreementMember" name="SecondAmendedAndRestatedCreditAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_SeniorSecuredTermLoanMember" name="SeniorSecuredTermLoanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_SheetMetalWorkersLocalOneSevenSevenPensionFundMember" name="SheetMetalWorkersLocalOneSevenSevenPensionFundMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_SheetMetalWorkersLocalTwoTwoFourPensionPlanMember" name="SheetMetalWorkersLocalTwoTwoFourPensionPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_SheetMetalWorkersNationalPensionFundMember" name="SheetMetalWorkersNationalPensionFundMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_StateAndForeignAuthoritiesMember" name="StateAndForeignAuthoritiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_StrobicAirCorporationMember" name="StrobicAirCorporationMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_TermDebtMember" name="TermDebtMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_TwoThousandAndSevenPlanMember" name="TwoThousandAndSevenPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_TwoThousandAndSeventeenPlanMember" name="TwoThousandAndSeventeenPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_TwoThousandSevenPlanMember" name="TwoThousandSevenPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_YellowZoneMember" name="YellowZoneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_AmortizationAndEarnoutExpensesPolicyPolicyTextBlock" name="AmortizationAndEarnoutExpensesPolicyPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cece_AssetsHeldForSalePolicyTextBlock" name="AssetsHeldForSalePolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cece_ClaimsPolicyPolicyTextBlock" name="ClaimsPolicyPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cece_DefinedBenefitPlansAndOtherPostretirementBenefitPlansTable" name="DefinedBenefitPlansAndOtherPostretirementBenefitPlansTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_IncomeTaxesTable" name="IncomeTaxesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_NatureOfBusinessAndSummaryOfSignificantAccountingPoliciesTable" name="NatureOfBusinessAndSummaryOfSignificantAccountingPoliciesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_ScheduleOfDefinedBenefitAndContributionPlanDisclosureTable" name="ScheduleOfDefinedBenefitAndContributionPlanDisclosureTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_ScheduleOfFairValueOfFinancialInstrumentsTable" name="ScheduleOfFairValueOfFinancialInstrumentsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_ScheduleOfGoodwillAndOtherIntangibleAssetsTable" name="ScheduleOfGoodwillAndOtherIntangibleAssetsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_ScheduleOfSummaryOfRestrictedStockUnitActivityTable" name="ScheduleOfSummaryOfRestrictedStockUnitActivityTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="cece_ActivityOfCurrentPortionOfEarnoutLiabilityTableTextBlock" name="ActivityOfCurrentPortionOfEarnoutLiabilityTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cece_IntraSegmentAndInterSegmentEliminationByRevenueTableTextBlock" name="IntraSegmentAndInterSegmentEliminationByRevenueTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cece_ScheduleOfLeaseTermsAndDiscountRateTableTextBlock" name="ScheduleOfLeaseTermsAndDiscountRateTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cece_ScheduleOfMaturitiesOfOperatingAndFinanceLeasesLiabilitiesTableTextBlock" name="ScheduleOfMaturitiesOfOperatingAndFinanceLeasesLiabilitiesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cece_ScheduleOfNetPeriodicBenefitCostForPensionBenefitsIncludedInAccompanyingConsolidatedStatementsOfOperationsTableTextBlock" name="ScheduleOfNetPeriodicBenefitCostForPensionBenefitsIncludedInAccompanyingConsolidatedStatementsOfOperationsTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cece_ScheduleOfSupplementalBalanceSheetInformationRelatedToLeasesTableTextBlock" name="ScheduleOfSupplementalBalanceSheetInformationRelatedToLeasesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cece_ScheduleOfSupplementalCashFlowInformationRelatedToLeasesTableTextBlock" name="ScheduleOfSupplementalCashFlowInformationRelatedToLeasesTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cece_ExecutiveTransactionExpensesPolicyTextBlock" name="ExecutiveTransactionExpensesPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cece_LeasesOperatingAndFinancingLeaseTextBlock" name="LeasesOperatingAndFinancingLeaseTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="cece_PrecontractCostPolicyTextBlock" name="PrecontractCostPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
</xsd:schema>
