content: <?xml version="1.0" encoding="UTF-8"?><edgarSubmission xmlns="http://www.sec.gov/edgar/ownership" xmlns:com="http://www.sec.gov/edgar/common">
    <headerData>
      <submissionType>144</submissionType>
      <filerInfo>
        <filer>
          <filerCredentials>
            <cik>0001805823</cik>
            <ccc>XXXXXXXX</ccc>
          </filerCredentials>
        </filer>
        <liveTestFlag>LIVE</liveTestFlag>
  
  
  
      </filerInfo>
    </headerData>
    <formData>
      <issuerInfo>
        <issuerCik>0000868857</issuerCik>
        <issuerName>AECOM</issuerName>
        <secFileNumber>000-52423</secFileNumber>
        <issuerAddress>
          <com:street1>13355 NOEL ROAD</com:street1>
          <com:street2>SUITE 400</com:street2>
          <com:city>DALLAS</com:city>
          <com:stateOrCountry>TX</com:stateOrCountry>
          <com:zipCode>75240</com:zipCode>
        </issuerAddress>
        <issuerContactPhone>(972) 788-1000</issuerContactPhone>
        <nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>Gan David Y.</nameOfPersonForWhoseAccountTheSecuritiesAreToBeSold>
        <relationshipsToIssuer>
          <relationshipToIssuer>Officer</relationshipToIssuer>
        </relationshipsToIssuer>
      </issuerInfo>
      <securitiesInformation>
        <securitiesClassTitle>COMMON</securitiesClassTitle>
        <brokerOrMarketmakerDetails>
          <name>MERRILL LYNCH</name>
          <address>
            <com:street1>3455 PEACHTREE RD NE</com:street1>
            <com:street2>SUITE 1000</com:street2>
            <com:city>ATLANTA</com:city>
            <com:stateOrCountry>GA</com:stateOrCountry>
            <com:zipCode>30326</com:zipCode>
          </address>
        </brokerOrMarketmakerDetails>
        <noOfUnitsSold>9398</noOfUnitsSold>
        <aggregateMarketValue>1035565.62</aggregateMarketValue>
        <noOfUnitsOutstanding>132463704</noOfUnitsOutstanding>
        <approxSaleDate>12/17/2024</approxSaleDate>
        <securitiesExchangeName>NEW YORK</securitiesExchangeName>
      </securitiesInformation>
      <securitiesToBeSold>
        <securitiesClassTitle>COMMON</securitiesClassTitle>
        <acquiredDate>12/15/2024</acquiredDate>
        <natureOfAcquisitionTransaction>PERFORMANCE STOCK UNIT VEST</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>AECOM</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>6362</amountOfSecuritiesAcquired>
        <paymentDate>12/15/2024</paymentDate>
        <natureOfPayment>COMPENSATORY PAYMENT</natureOfPayment>
      </securitiesToBeSold>
      <securitiesToBeSold>
        <securitiesClassTitle>COMMON</securitiesClassTitle>
        <acquiredDate>12/15/2024</acquiredDate>
        <natureOfAcquisitionTransaction>RESTRICTED STOCK UNIT VEST</natureOfAcquisitionTransaction>
        <nameOfPersonfromWhomAcquired>AECOM</nameOfPersonfromWhomAcquired>
        <isGiftTransaction>N</isGiftTransaction>
        <amountOfSecuritiesAcquired>3036</amountOfSecuritiesAcquired>
        <paymentDate>12/15/2024</paymentDate>
        <natureOfPayment>COMPENSATORY PAYMENT</natureOfPayment>
      </securitiesToBeSold>
      <nothingToReportFlagOnSecuritiesSoldInPast3Months>N</nothingToReportFlagOnSecuritiesSoldInPast3Months>
      <securitiesSoldInPast3Months>
        <sellerDetails>
          <name>DAVID GAN</name>
          <address>
            <com:street1>13355 NOEL ROAD</com:street1>
            <com:street2>SUITE 400</com:street2>
            <com:city>DALLAS</com:city>
            <com:stateOrCountry>TX</com:stateOrCountry>
            <com:zipCode>75240</com:zipCode>
          </address>
        </sellerDetails>
        <securitiesClassTitle>COMMON</securitiesClassTitle>
        <saleDate>12/16/2024</saleDate>
        <amountOfSecuritiesSold>11500</amountOfSecuritiesSold>
        <grossProceeds>1281967.26</grossProceeds>
      </securitiesSoldInPast3Months>
      <noticeSignature>
        <noticeDate>12/17/2024</noticeDate>
        <planAdoptionDates>
          <planAdoptionDate>08/20/2024</planAdoptionDate>
        </planAdoptionDates>
        <signature>DAVID GAN</signature>
      </noticeSignature>
    </formData>
  </edgarSubmission>
metadata_documents: [{"type": "144", "sequence": "1", "filename": "primary_doc.xml", "secsgml_size_bytes": 4059}]
text: 144
  0001805823
  XXXXXXXX
  LIVE
  0000868857
  AECOM
  000-52423
  13355 NOEL ROAD
  SUITE 400
  DALLAS
  TX
  75240
  (972) 788-1000
  Gan David Y.
  Officer
  COMMON
  MERRILL LYNCH
  3455 PEACHTREE RD NE
  SUITE 1000
  ATLANTA
  GA
  30326
  9398
  1035565.62
  132463704
  12/17/2024
  NEW YORK
  COMMON
  12/15/2024
  PERFORMANCE STOCK UNIT VEST
  AECOM
  N
  6362
  12/15/2024
  COMPENSATORY PAYMENT
  COMMON
  12/15/2024
  RESTRICTED STOCK UNIT VEST
  AECOM
  N
  3036
  12/15/2024
  COMPENSATORY PAYMENT
  N
  DAVID GAN
  13355 NOEL ROAD
  SUITE 400
  DALLAS
  TX
  75240
  COMMON
  12/16/2024
  11500
  1281967.26
  12/17/2024
  08/20/2024
  DAVID GAN