<?xml version="1.0" encoding="utf-8"?>
<Return xmlns="http://www.irs.gov/efile" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.irs.gov/efile" returnVersion="2020v4.1">
  <ReturnHeader binaryAttachmentCnt="0">
    <ReturnTs>2021-10-06T13:49:46-05:00</ReturnTs>
    <TaxPeriodEndDt>2021-05-31</TaxPeriodEndDt>
    <PreparerFirmGrp>
      <PreparerFirmEIN>231551315</PreparerFirmEIN>
      <PreparerFirmName>
        <BusinessNameLine1Txt>TROUT CPA</BusinessNameLine1Txt>
      </PreparerFirmName>
      <PreparerUSAddress>
        <AddressLine1Txt>1705 OREGON PIKE</AddressLine1Txt>
        <CityNm>LANCASTER</CityNm>
        <StateAbbreviationCd>PA</StateAbbreviationCd>
        <ZIPCd>17601</ZIPCd>
      </PreparerUSAddress>
    </PreparerFirmGrp>
    <ReturnTypeCd>990EZ</ReturnTypeCd>
    <TaxPeriodBeginDt>2020-06-01</TaxPeriodBeginDt>
    <Filer>
      <EIN>237197820</EIN>
      <BusinessName>
        <BusinessNameLine1Txt>MECHANICAL CONTRACTORS ASSOCIATION</BusinessNameLine1Txt>
        <BusinessNameLine2Txt>OF NORTHEASTERN PENNSYLVANIA INC</BusinessNameLine2Txt>
      </BusinessName>
      <BusinessNameControlTxt>MECH</BusinessNameControlTxt>
      <PhoneNum>7179851392</PhoneNum>
      <USAddress>
        <AddressLine1Txt>1751 LAMPLIGHT CIRCLE</AddressLine1Txt>
        <CityNm>MIDDLETOWN</CityNm>
        <StateAbbreviationCd>PA</StateAbbreviationCd>
        <ZIPCd>17057</ZIPCd>
      </USAddress>
    </Filer>
    <BusinessOfficerGrp>
      <PersonNm>JOSEPH MARX</PersonNm>
      <PersonTitleTxt>PRESIDENT</PersonTitleTxt>
      <PhoneNum>7179851392</PhoneNum>
      <SignatureDt>2021-09-21</SignatureDt>
      <DiscussWithPaidPreparerInd>1</DiscussWithPaidPreparerInd>
    </BusinessOfficerGrp>
    <SigningOfficerGrp>
      <PersonFullName>
        <PersonFirstNm>JOSEPH</PersonFirstNm>
        <PersonLastNm>MARX</PersonLastNm>
      </PersonFullName>
      <SSN>999009999</SSN>
    </SigningOfficerGrp>
    <PreparerPersonGrp>
      <PreparerPersonNm>DEBORAH KELLY</PreparerPersonNm>
      <PTIN>P00013251</PTIN>
      <PhoneNum>7175692900</PhoneNum>
      <PreparationDt>2021-09-21</PreparationDt>
    </PreparerPersonGrp>
    <AdditionalFilerInformation>
      <TrustedCustomerGrp>
        <TrustedCustomerCd>2</TrustedCustomerCd>
        <AuthenticationAssuranceLevelCd>AAL1</AuthenticationAssuranceLevelCd>
        <IdentityAssuranceLevelCd>IAL1</IdentityAssuranceLevelCd>
      </TrustedCustomerGrp>
    </AdditionalFilerInformation>
    <TaxYr>2020</TaxYr>
    <BuildTS>2022-09-23 18:48:47Z</BuildTS>
  </ReturnHeader>
  <ReturnData documentCnt="2">
    <IRS990EZ documentId="RetDoc1234200001" referenceDocumentId="RetDoc1051800001">
      <MethodOfAccountingCashInd>X</MethodOfAccountingCashInd>
      <ScheduleBNotRequiredInd>X</ScheduleBNotRequiredInd>
      <WebsiteAddressTxt>N/A</WebsiteAddressTxt>
      <Organization501cInd organization501cTypeTxt="6">X</Organization501cInd>
      <TypeOfOrganizationCorpInd>X</TypeOfOrganizationCorpInd>
      <GrossReceiptsAmt>120503</GrossReceiptsAmt>
      <InfoInScheduleOPartIInd>X</InfoInScheduleOPartIInd>
      <ProgramServiceRevenueAmt>120000</ProgramServiceRevenueAmt>
      <InvestmentIncomeAmt>503</InvestmentIncomeAmt>
      <TotalRevenueAmt>120503</TotalRevenueAmt>
      <SalariesOtherCompEmplBnftAmt>30000</SalariesOtherCompEmplBnftAmt>
      <FeesAndOtherPymtToIndCntrctAmt>1130</FeesAndOtherPymtToIndCntrctAmt>
      <OtherExpensesTotalAmt>2513</OtherExpensesTotalAmt>
      <TotalExpensesAmt>33643</TotalExpensesAmt>
      <ExcessOrDeficitForYearAmt>86860</ExcessOrDeficitForYearAmt>
      <NetAssetsOrFundBalancesBOYAmt>295785</NetAssetsOrFundBalancesBOYAmt>
      <OtherChangesInNetAssetsAmt>15678</OtherChangesInNetAssetsAmt>
      <NetAssetsOrFundBalancesEOYAmt>398323</NetAssetsOrFundBalancesEOYAmt>
      <CashSavingsAndInvestmentsGrp>
        <BOYAmt>295785</BOYAmt>
        <EOYAmt>398323</EOYAmt>
      </CashSavingsAndInvestmentsGrp>
      <Form990TotalAssetsGrp>
        <BOYAmt>295785</BOYAmt>
        <EOYAmt>398323</EOYAmt>
      </Form990TotalAssetsGrp>
      <SumOfTotalLiabilitiesGrp>
        <BOYAmt>0</BOYAmt>
        <EOYAmt>0</EOYAmt>
      </SumOfTotalLiabilitiesGrp>
      <NetAssetsOrFundBalancesGrp>
        <BOYAmt>295785</BOYAmt>
        <EOYAmt>398323</EOYAmt>
      </NetAssetsOrFundBalancesGrp>
      <InfoInScheduleOPartIIIInd>X</InfoInScheduleOPartIIIInd>
      <PrimaryExemptPurposeTxt>TO PROMOTE AND ADVANCE THE MECHANICAL CONTRACTING INDUSTRY</PrimaryExemptPurposeTxt>
      <ProgramSrvcAccomplishmentGrp>
        <DescriptionProgramSrvcAccomTxt>THE PROMOTION AND ADVANCEMENT OF THE MECHANICAL CONTRACTING INDUSTRY</DescriptionProgramSrvcAccomTxt>
        <GrantsAndAllocationsAmt>0</GrantsAndAllocationsAmt>
        <ProgramServiceExpensesAmt>0</ProgramServiceExpensesAmt>
      </ProgramSrvcAccomplishmentGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>JOSEPH MARX</PersonNm>
        <TitleTxt>PRESIDENT</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>2.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>STEVEN WEINBERGER</PersonNm>
        <TitleTxt>VICE PRESIDENT</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>THOMAS ROGAN</PersonNm>
        <TitleTxt>SECRETARY</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>DOMINIC YANNUZZI</PersonNm>
        <TitleTxt>TREASURER</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>1.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>0</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <OfficerDirectorTrusteeEmplGrp>
        <PersonNm>LORI ESHENAUR</PersonNm>
        <TitleTxt>EXECUTIVE DIRECTOR</TitleTxt>
        <AverageHrsPerWkDevotedToPosRt>6.00</AverageHrsPerWkDevotedToPosRt>
        <CompensationAmt>30000</CompensationAmt>
        <EmployeeBenefitProgramAmt>0</EmployeeBenefitProgramAmt>
        <ExpenseAccountOtherAllwncAmt>0</ExpenseAccountOtherAllwncAmt>
      </OfficerDirectorTrusteeEmplGrp>
      <ActivitiesNotPreviouslyRptInd>0</ActivitiesNotPreviouslyRptInd>
      <ChgMadeToOrgnzngDocNotRptInd>0</ChgMadeToOrgnzngDocNotRptInd>
      <OrganizationHadUBIInd>0</OrganizationHadUBIInd>
      <SubjectToProxyTaxInd>0</SubjectToProxyTaxInd>
      <OrganizationDissolvedEtcInd>0</OrganizationDissolvedEtcInd>
      <DirectIndirectPltclExpendAmt>0</DirectIndirectPltclExpendAmt>
      <MadeLoansToFromOfficersInd>0</MadeLoansToFromOfficersInd>
      <ProhibitedTaxShelterTransInd>0</ProhibitedTaxShelterTransInd>
      <BooksInCareOfDetail>
        <BusinessName>
          <BusinessNameLine1Txt>LORI ESHENAUR</BusinessNameLine1Txt>
        </BusinessName>
        <USAddress>
          <AddressLine1Txt>1751 LAMPLIGHT CIRCLE</AddressLine1Txt>
          <CityNm>MIDDLETOWN</CityNm>
          <StateAbbreviationCd>PA</StateAbbreviationCd>
          <ZIPCd>17057</ZIPCd>
        </USAddress>
        <PhoneNum>7179851392</PhoneNum>
      </BooksInCareOfDetail>
      <ForeignFinancialAccountInd>0</ForeignFinancialAccountInd>
      <ForeignOfficeInd>0</ForeignOfficeInd>
      <DonorAdvisedFndsInd>0</DonorAdvisedFndsInd>
      <OperateHospitalInd>0</OperateHospitalInd>
      <TanningServicesProvidedInd>0</TanningServicesProvidedInd>
      <RelatedOrganizationCtrlEntInd>0</RelatedOrganizationCtrlEntInd>
      <PoliticalCampaignActyInd>0</PoliticalCampaignActyInd>
    </IRS990EZ>
    <IRS990ScheduleO documentId="RetDoc1051800001">
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART I, LINE 4 - OTHER INVESTMENT INCOME</FormAndLineReferenceDesc>
        <ExplanationTxt>DESCRIPTION: DIVIDENDS. AMOUNT: 467. DESCRIPTION: INTEREST. AMOUNT: 36. TOTAL INCLUDED ON FORM 990-EZ, LINE 4: 503.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART I, LINE 16 - OTHER EXPENSES</FormAndLineReferenceDesc>
        <ExplanationTxt>DESCRIPTION: INSURANCE. AMOUNT: 1,695. DESCRIPTION: DUES AND SUBSCRIPTIONS. AMOUNT: 749. DESCRIPTION: BANK SERVICE CHARGES. AMOUNT: 69. TOTAL TO FORM 990-EZ, LINE 16: 2,513.</ExplanationTxt>
      </SupplementalInformationDetail>
      <SupplementalInformationDetail>
        <FormAndLineReferenceDesc>FORM 990-EZ, PART I, LINE 20 - OTHER CHANGES IN NET ASSETS</FormAndLineReferenceDesc>
        <ExplanationTxt>DESCRIPTION: UNREALIZED GAINS ON INVESTMENTS, NE. AMOUNT: 15,678.</ExplanationTxt>
      </SupplementalInformationDetail>
    </IRS990ScheduleO>
  </ReturnData>
</Return>
