EX-23.1 4 a2226692zex-23_1.htm EX-23.1
QuickLinks -- Click here to rapidly navigate through this document

EXHIBIT 23.1

Consent of Independent Registered Public Accounting Firm

We consent to the incorporation by reference in the following Registration Statements (Form S-8 Nos. 333-167047, 333-142070, and 333-199453) pertaining to various stock incentive, purchase and retirement plans of AECOM (formerly AECOM Technology Corporation) of our reports dated November 25, 2015, with respect to the consolidated financial statements and schedule of AECOM and to the effectiveness of internal control over financial reporting of AECOM included in this Annual Report (Form 10-K) of AECOM for the year ended September 30, 2015.

|  | /s/ ERNST & YOUNG LLP
Los Angeles, California November 25, 2015 |  |

QuickLinks

EXHIBIT 23.1

Consent of Independent Registered Public Accounting Firm