The word Amentum is derived from a Greek word used to describe the leather device that was attached to a javelin to increase its range and the stability in flight. The device allowed the javelin to land on target with precision. As we move forward as an independent company, we communicate confidence and stability to our customers through a strong commitment to excellence in all that we do.

Moreover, the name also sounds like momentum, which connotes our forward-leaning approach and innovation-driven future in support of our customers’ missions. The new name Amentum serves as a beacon for sharing our continued story of success, experience, and our people’s resilience and dedication to the mission.

On February 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.