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

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2024 Workiva-->
<!--r:4e10f20e-4042-4528-afd0-01316a3985f1,g:fe0d05a6-d2e7-4029-bbaa-340a0cf67bca-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:dxpe="http://dxpe.com/20240630" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:dtr-types1="http://www.xbrl.org/dtr/type/2020-01-21" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2022-03-31" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://dxpe.com/20240630">
  <xs:import namespace="http://fasb.org/srt/2024" schemaLocation="https://xbrl.fasb.org/srt/2024/elts/srt-2024.xsd"/>
  <xs:import namespace="http://fasb.org/us-gaap/2024" schemaLocation="https://xbrl.fasb.org/us-gaap/2024/elts/us-gaap-2024.xsd"/>
  <xs:import namespace="http://www.w3.org/1999/xlink" schemaLocation="http://www.xbrl.org/2003/xlink-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/2020-01-21" schemaLocation="https://www.xbrl.org/dtr/type/2020-01-21/types.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/2022-03-31" schemaLocation="https://www.xbrl.org/dtr/type/2022-03-31/types.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/dei/2024" schemaLocation="https://xbrl.sec.gov/dei/2024/dei-2024.xsd"/>
  <xs:annotation>
    <xs:appinfo>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="dxpe-20240630_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="dxpe-20240630_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="dxpe-20240630_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="dxpe-20240630_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple"/>
      <link:roleType id="COVER" roleURI="http://dxpe.com/role/COVER">
        <link:definition>0000001 - Document - COVER</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONSANDCOMPREHENSIVEINCOME" roleURI="http://dxpe.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFOPERATIONSANDCOMPREHENSIVEINCOME">
        <link:definition>9952151 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONDENSEDCONSOLIDATEDBALANCESHEETS" roleURI="http://dxpe.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS">
        <link:definition>9952152 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical" roleURI="http://dxpe.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical">
        <link:definition>9952153 - Statement - CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS" roleURI="http://dxpe.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS">
        <link:definition>9952154 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY" roleURI="http://dxpe.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFEQUITY">
        <link:definition>9952155 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF EQUITY</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="THECOMPANY" roleURI="http://dxpe.com/role/THECOMPANY">
        <link:definition>9952156 - Disclosure - THE COMPANY</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SUMMARYOFSIGNIFICANTACCOUNTINGANDBUSINESSPOLICIES" roleURI="http://dxpe.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGANDBUSINESSPOLICIES">
        <link:definition>9952157 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING AND BUSINESS POLICIES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RECENTACCOUNTINGPRONOUNCEMENTS" roleURI="http://dxpe.com/role/RECENTACCOUNTINGPRONOUNCEMENTS">
        <link:definition>9952158 - Disclosure - RECENT ACCOUNTING PRONOUNCEMENTS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FAIRVALUEOFFINANCIALASSETSANDLIABILITIES" roleURI="http://dxpe.com/role/FAIRVALUEOFFINANCIALASSETSANDLIABILITIES">
        <link:definition>9952159 - Disclosure - FAIR VALUE OF FINANCIAL ASSETS AND LIABILITIES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="INVENTORIES" roleURI="http://dxpe.com/role/INVENTORIES">
        <link:definition>9952160 - Disclosure - INVENTORIES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONTRACTASSETSANDLIABILITIES" roleURI="http://dxpe.com/role/CONTRACTASSETSANDLIABILITIES">
        <link:definition>9952161 - Disclosure - CONTRACT ASSETS AND LIABILITIES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="INCOMETAXES" roleURI="http://dxpe.com/role/INCOMETAXES">
        <link:definition>9952162 - Disclosure - INCOME TAXES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LONGTERMDEBT" roleURI="http://dxpe.com/role/LONGTERMDEBT">
        <link:definition>9952163 - Disclosure - LONG-TERM DEBT</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EARNINGSPERSHARE" roleURI="http://dxpe.com/role/EARNINGSPERSHARE">
        <link:definition>9952164 - Disclosure - EARNINGS PER SHARE</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="COMMITMENTSANDCONTINGENCIES" roleURI="http://dxpe.com/role/COMMITMENTSANDCONTINGENCIES">
        <link:definition>9952165 - Disclosure - COMMITMENTS AND CONTINGENCIES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SEGMENTREPORTING" roleURI="http://dxpe.com/role/SEGMENTREPORTING">
        <link:definition>9952166 - Disclosure - SEGMENT REPORTING</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="COMMONSTOCKANDSHAREREPURCHASES" roleURI="http://dxpe.com/role/COMMONSTOCKANDSHAREREPURCHASES">
        <link:definition>9952167 - Disclosure - COMMON STOCK AND SHARE REPURCHASES</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BUSINESSACQUISITIONS" roleURI="http://dxpe.com/role/BUSINESSACQUISITIONS">
        <link:definition>9952168 - Disclosure - BUSINESS ACQUISITIONS</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SUPPLEMENTALCASHFLOWINFORMATION" roleURI="http://dxpe.com/role/SUPPLEMENTALCASHFLOWINFORMATION">
        <link:definition>9952169 - Disclosure - SUPPLEMENTAL CASH FLOW INFORMATION</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SUMMARYOFSIGNIFICANTACCOUNTINGANDBUSINESSPOLICIESPolicies" roleURI="http://dxpe.com/role/SUMMARYOFSIGNIFICANTACCOUNTINGANDBUSINESSPOLICIESPolicies">
        <link:definition>9954471 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING AND BUSINESS POLICIES (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FAIRVALUEOFFINANCIALASSETSANDLIABILITIESTables" roleURI="http://dxpe.com/role/FAIRVALUEOFFINANCIALASSETSANDLIABILITIESTables">
        <link:definition>9954472 - Disclosure - FAIR VALUE OF FINANCIAL ASSETS AND LIABILITIES (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="INVENTORIESTables" roleURI="http://dxpe.com/role/INVENTORIESTables">
        <link:definition>9954473 - Disclosure - INVENTORIES (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONTRACTASSETSANDLIABILITIESTables" roleURI="http://dxpe.com/role/CONTRACTASSETSANDLIABILITIESTables">
        <link:definition>9954474 - Disclosure - CONTRACT ASSETS AND LIABILITIES (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LONGTERMDEBTTables" roleURI="http://dxpe.com/role/LONGTERMDEBTTables">
        <link:definition>9954475 - Disclosure - LONG-TERM DEBT (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EARNINGSPERSHARETables" roleURI="http://dxpe.com/role/EARNINGSPERSHARETables">
        <link:definition>9954476 - Disclosure - EARNINGS PER SHARE (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SEGMENTREPORTINGTables" roleURI="http://dxpe.com/role/SEGMENTREPORTINGTables">
        <link:definition>9954477 - Disclosure - SEGMENT REPORTING (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="COMMONSTOCKANDSHAREREPURCHASESTables" roleURI="http://dxpe.com/role/COMMONSTOCKANDSHAREREPURCHASESTables">
        <link:definition>9954478 - Disclosure - COMMON STOCK AND SHARE REPURCHASES (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BUSINESSACQUISITIONSTables" roleURI="http://dxpe.com/role/BUSINESSACQUISITIONSTables">
        <link:definition>9954479 - Disclosure - BUSINESS ACQUISITIONS (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SUPPLEMENTALCASHFLOWINFORMATIONTables" roleURI="http://dxpe.com/role/SUPPLEMENTALCASHFLOWINFORMATIONTables">
        <link:definition>9954480 - Disclosure - SUPPLEMENTAL CASH FLOW INFORMATION (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="THECOMPANYDetails" roleURI="http://dxpe.com/role/THECOMPANYDetails">
        <link:definition>9954481 - Disclosure - THE COMPANY (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FAIRVALUEOFFINANCIALASSETSANDLIABILITIESNarrativeDetails" roleURI="http://dxpe.com/role/FAIRVALUEOFFINANCIALASSETSANDLIABILITIESNarrativeDetails">
        <link:definition>9954482 - Disclosure - FAIR VALUE OF FINANCIAL ASSETS AND LIABILITIES - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FAIRVALUEOFFINANCIALASSETSANDLIABILITIESReconciliationofBeginningandEndingBalancesDetails" roleURI="http://dxpe.com/role/FAIRVALUEOFFINANCIALASSETSANDLIABILITIESReconciliationofBeginningandEndingBalancesDetails">
        <link:definition>9954483 - Disclosure - FAIR VALUE OF FINANCIAL ASSETS AND LIABILITIES - Reconciliation of Beginning and Ending Balances (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="INVENTORIESDetails" roleURI="http://dxpe.com/role/INVENTORIESDetails">
        <link:definition>9954484 - Disclosure - INVENTORIES (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONTRACTASSETSANDLIABILITIESDetails" roleURI="http://dxpe.com/role/CONTRACTASSETSANDLIABILITIESDetails">
        <link:definition>9954485 - Disclosure - CONTRACT ASSETS AND LIABILITIES (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CONTRACTASSETSANDLIABILITIESDetails_1" roleURI="http://dxpe.com/role/CONTRACTASSETSANDLIABILITIESDetails_1">
        <link:definition>9954485 - Disclosure - CONTRACT ASSETS AND LIABILITIES (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="INCOMETAXESDetails" roleURI="http://dxpe.com/role/INCOMETAXESDetails">
        <link:definition>9954486 - Disclosure - INCOME TAXES (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LONGTERMDEBTComponentsofLongtermDebtDetails" roleURI="http://dxpe.com/role/LONGTERMDEBTComponentsofLongtermDebtDetails">
        <link:definition>9954487 - Disclosure - LONG-TERM DEBT - Components of Long-term Debt (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LONGTERMDEBTNarrativeDetails" roleURI="http://dxpe.com/role/LONGTERMDEBTNarrativeDetails">
        <link:definition>9954488 - Disclosure - LONG-TERM DEBT - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LONGTERMDEBTMaturitiesofLongtermDebtDetails" roleURI="http://dxpe.com/role/LONGTERMDEBTMaturitiesofLongtermDebtDetails">
        <link:definition>9954489 - Disclosure - LONG-TERM DEBT - Maturities of Long-term Debt (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EARNINGSPERSHAREDetails" roleURI="http://dxpe.com/role/EARNINGSPERSHAREDetails">
        <link:definition>9954490 - Disclosure - EARNINGS PER SHARE (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SEGMENTREPORTINGFinancialInformationofCompanysSegmentsDetails" roleURI="http://dxpe.com/role/SEGMENTREPORTINGFinancialInformationofCompanysSegmentsDetails">
        <link:definition>9954491 - Disclosure - SEGMENT REPORTING - Financial Information of Company's Segments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SEGMENTREPORTINGReconciliationofOperatingIncometoConsolidatedIncomeDetails" roleURI="http://dxpe.com/role/SEGMENTREPORTINGReconciliationofOperatingIncometoConsolidatedIncomeDetails">
        <link:definition>9954492 - Disclosure - SEGMENT REPORTING - Reconciliation of Operating Income to Consolidated Income (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="COMMONSTOCKANDSHAREREPURCHASESSummaryofChangesinOutstandingCommonStockDetails" roleURI="http://dxpe.com/role/COMMONSTOCKANDSHAREREPURCHASESSummaryofChangesinOutstandingCommonStockDetails">
        <link:definition>9954493 - Disclosure - COMMON STOCK AND SHARE REPURCHASES - Summary of Changes in Outstanding Common Stock (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="COMMONSTOCKANDSHAREREPURCHASESNarrativeDetails" roleURI="http://dxpe.com/role/COMMONSTOCKANDSHAREREPURCHASESNarrativeDetails">
        <link:definition>9954494 - Disclosure - COMMON STOCK AND SHARE REPURCHASES - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="COMMONSTOCKANDSHAREREPURCHASESScheduleofShareRepurchasesDetails" roleURI="http://dxpe.com/role/COMMONSTOCKANDSHAREREPURCHASESScheduleofShareRepurchasesDetails">
        <link:definition>9954495 - Disclosure - COMMON STOCK AND SHARE REPURCHASES - Schedule of Share Repurchases (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BUSINESSACQUISITIONSPurchasePriceConsiderationDetails" roleURI="http://dxpe.com/role/BUSINESSACQUISITIONSPurchasePriceConsiderationDetails">
        <link:definition>9954496 - Disclosure - BUSINESS ACQUISITIONS - Purchase Price Consideration (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="BUSINESSACQUISITIONSNarrativeDetails" roleURI="http://dxpe.com/role/BUSINESSACQUISITIONSNarrativeDetails">
        <link:definition>9954497 - Disclosure - BUSINESS ACQUISITIONS - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SUPPLEMENTALCASHFLOWINFORMATIONDetails" roleURI="http://dxpe.com/role/SUPPLEMENTALCASHFLOWINFORMATIONDetails">
        <link:definition>9954498 - Disclosure - SUPPLEMENTAL CASH FLOW INFORMATION (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xs:appinfo>
  </xs:annotation>
  <xs:element id="dxpe_WeightedAverageNumberOfSharesOutstandingBasicAndDilutedAbstract" abstract="true" name="WeightedAverageNumberOfSharesOutstandingBasicAndDilutedAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="dxpe_ContractWithCustomerLiabilityCustomerAdvancesCurrent" abstract="false" name="ContractWithCustomerLiabilityCustomerAdvancesCurrent" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dxpe_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationInExcessOfFairValue" abstract="false" name="BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationInExcessOfFairValue" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dxpe_IncreaseDecreaseInCostsAndEstimatedProfitsInExcessOfBilling" abstract="false" name="IncreaseDecreaseInCostsAndEstimatedProfitsInExcessOfBilling" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dxpe_IncreaseDecreaseInBillingInExcessOfCostAndEstimatedProfits" abstract="false" name="IncreaseDecreaseInBillingInExcessOfCostAndEstimatedProfits" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dxpe_CompanyAbstract" abstract="true" name="CompanyAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="dxpe_PMIBurlingameDrydonCiscoAndSullivanMember" abstract="true" name="PMIBurlingameDrydonCiscoAndSullivanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="dxpe_ValuationTechniqueDiscountedCashFlowAndWeightedProbabilityOfPossiblePaymentsMember" abstract="true" name="ValuationTechniqueDiscountedCashFlowAndWeightedProbabilityOfPossiblePaymentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="dxpe_AnnualizedEBITDAAndProbabilityOfAchievementMember" abstract="true" name="AnnualizedEBITDAAndProbabilityOfAchievementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="dxpe_ContingentConsiderationLiabilityMember" abstract="true" name="ContingentConsiderationLiabilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="dxpe_EstimatedEarningsThereonOnUncompletedContracts" abstract="false" name="EstimatedEarningsThereonOnUncompletedContracts" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dxpe_CostAndEarningsOfUncompletedContracts" abstract="false" name="CostAndEarningsOfUncompletedContracts" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dxpe_CostsAndEstimatedEarningsBilledToDate" abstract="false" name="CostsAndEstimatedEarningsBilledToDate" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dxpe_ContractWithCustomerAssetNetCurrentExcludingContractWithCustomerLiabilityCurrentAndTranslationAdjustment" abstract="false" name="ContractWithCustomerAssetNetCurrentExcludingContractWithCustomerLiabilityCurrentAndTranslationAdjustment" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dxpe_CostsAndEstimatedEarningsOnUncompletedContractsIncludedInAccompanyingBalanceSheetsUnderCaptionsAbstract" abstract="true" name="CostsAndEstimatedEarningsOnUncompletedContractsIncludedInAccompanyingBalanceSheetsUnderCaptionsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="dxpe_ContractWithCustomerLiabilityForeignCurrencyTranslationAdjustment" abstract="false" name="ContractWithCustomerLiabilityForeignCurrencyTranslationAdjustment" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dxpe_ABLRevolverMember" abstract="true" name="ABLRevolverMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="dxpe_SeniorSecuredTermLoanBMember" abstract="true" name="SeniorSecuredTermLoanBMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="dxpe_LongTermDebtExcludingCurrentMaturitiesGross" abstract="false" name="LongTermDebtExcludingCurrentMaturitiesGross" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dxpe_SecuredOvernightFinancingRateSOFROrCanadianDollarOfferedRateCDORMember" abstract="true" name="SecuredOvernightFinancingRateSOFROrCanadianDollarOfferedRateCDORMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="dxpe_CanadianPrimeRateOrCanadianBaseRateMember" abstract="true" name="CanadianPrimeRateOrCanadianBaseRateMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="dxpe_DebtInstrumentAccordionFeatureIncreaseLimit" abstract="false" name="DebtInstrumentAccordionFeatureIncreaseLimit" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dxpe_DebtInstrumentQuarterlyInstallmentPaymentPercentage" abstract="false" name="DebtInstrumentQuarterlyInstallmentPaymentPercentage" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="dxpe_DebtInstrumentVariableRateFloor" abstract="false" name="DebtInstrumentVariableRateFloor" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="dxpe_LineOfCreditFacilityAccordionFeatureIncreaseLimit" abstract="false" name="LineOfCreditFacilityAccordionFeatureIncreaseLimit" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dxpe_LineOfCreditFacilityAccordionFeatureMinimumIncrementsOfIncreaseInMaximumBorrowingCapacity" abstract="false" name="LineOfCreditFacilityAccordionFeatureMinimumIncrementsOfIncreaseInMaximumBorrowingCapacity" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dxpe_LongTermDebtMaturityAfterYearFour" abstract="false" name="LongTermDebtMaturityAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dxpe_ServiceCentersMember" abstract="true" name="ServiceCentersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="dxpe_InnovativePumpingSolutionsMember" abstract="true" name="InnovativePumpingSolutionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="dxpe_SupplyChainServicesMember" abstract="true" name="SupplyChainServicesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="dxpe_IncomeLossFromOperationsForReportableSegments" abstract="false" name="IncomeLossFromOperationsForReportableSegments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dxpe_AdjustmentForAbstract" abstract="true" name="AdjustmentForAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="dxpe_ShareRepurchaseProgramDecember2022Member" abstract="true" name="ShareRepurchaseProgramDecember2022Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="dxpe_StockRepurchaseProgramExpirationPeriod" abstract="false" name="StockRepurchaseProgramExpirationPeriod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="dxpe_Acquisitions2024Member" abstract="true" name="Acquisitions2024Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="dxpe_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetTangibleAssets" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedNetTangibleAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="dxpe_TreasuryStockValueAccrualForRepurchase" abstract="false" name="TreasuryStockValueAccrualForRepurchase" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
