Amentum

Amentum was founded in 2020 as a spinout of the Management Services Group of AECOM, consisting of the non-construction parts of the company's federal work as well as its commercial operations and maintenance business. This came as a result of a process by AECOM to realign its business to focus more clearly on the architect, engineering, and construction market.

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Although Amentum is new, our heritage dates back to the early 20th Century, with roots in iconic American companies with long and storied histories of serving the needs of our clients.

On Feb. 1, 2020, Amentum was born out of the federal business of AECOM, as a culmination of over 100+ years of delivering results for our clients.

This part of our origin stem from four primary lineages – EG&G, Westinghouse Government Services, Washington Group International, Lear Siegler Services, and Apptis. Together, these companies provide nuclear energy solutions, infrastructure, national security, as well as operations and maintenance. This group was brought together by engineering and infrastructure giant URS Corporation which was in turn purchased by AECOM in 2014. AECOM had previously acquired several players in the federal space including SSI (international development) and McNeil Technologies (infrastructure / intel community)

Our energy lineage, acquired via Washington Group International, includes companies such as Morrison Knudsen that began providing infrastructure work at the turn of the 20th century. Westinghouse Government Services and EG&G trace their lineage back to the Manhattan Project. Lear Siegler helped maintain the fighting force during the Cold War.