Amentum has established its corporate headquarters in Chantilly, Virginia, reinforcing its presence within the U.S. national security and government contracting corridor near Washington, D.C.

The company reports approximately 50,000–53,000 employees operating in more than 70–80 countries across all seven continents, indicating substantial global operational reach and delivery capacity.

Private equity firm American Securities lists Amentum as a portfolio company, with the investment initiated in January 2020, signaling institutional backing and access to significant growth capital.

Amentum Services, Inc. is a member of the SOSSEC consortium, highlighting collaboration on U.S. defense‑related prototyping and technology programs in ISR, mission command, propulsion, sensors, and smart facilities.

Amentum publicly positions itself as a global leader in advanced engineering and innovative technology solutions, trusted by the U.S. government and its allies for programs of critical national significance across environment, energy, space, intelligence, and defense markets.

Corporate materials emphasize expertise in safety, security, and operations of nuclear assets, signaling deep specialization and likely compliance with stringent nuclear and national security regulatory frameworks.

Amentum’s dedicated careers portal and references to a workforce of roughly 50,000 employees indicate ongoing large‑scale recruitment and workforce sustainment across government and private‑sector programs.

Amentum has communicated plans to relocate and consolidate its headquarters presence into Virginia, aligning corporate leadership and operations with its core U.S. federal customer base.