Amentum (company)

Amentum Holdings, Inc.

Company type	Public
Traded as	NYSE:  AMTM S&P 600 component
Industry	National security, defense, healthcare, engineering
Predecessor	AECOM Management Services group DynCorp PAE
Founded	February 4, 2020 (5 years ago) (2020-02-04) in Germantown, Maryland
Headquarters	Chantilly, Virginia, U.S.
Area served	Worldwide
Key people	John Heller (CEO), Lewis George David Griffiths (Owner)
Products	Government Services
Revenue	> US$12.5 billion (2025)
Owner	American Securities Lindsay Goldberg Lewis George David Griffiths
Number of employees	> 53,000 (2025)
Website	amentum.com
Footnotes /references [1] [2] [3]

Amentum Holdings, Inc. (formally Amentum Government Services Holding LLC) is an American government and commercial services contractor based in Chantilly, Virginia. ^{[4] [5]} The company was formed in 2020 from the spinout of AECOM's Management Services / federal group. ^[6] After Leidos, it is the second-largest government services (non equipment producing) contractor in the US government contracting market. ^[7]

History

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. ^[8]

In March 2024, Amentum announced the completion of its merger with Jacobs Solutions Inc.'s Critical Mission Solutions and Cyber and Intelligence businesses. ^[9] In September of that year, it became a publicly traded company on the NYSE under the ticker symbol "AMTM", becoming a part of the S&P 500. ^[10]

On April 23, 2025, Lockheed Martin announced it had agreed to buy Amentum's Rapid Business Solutions Business for $360M ^[11] The deal was closed in June 2025. ^[12]

Growth through acquisitions

As part of the strategy by its owners, Amentum has pursued acquisitions of other government contractors including:

• 2020 - DynCorp ^{[13] [14]}
• 2022 - PAE ^[15]

Notable Projects

• Training of all US Army helicopter pilots at Fort Rucker for the United States Army Aviation Center of Excellence ^[16]
• Various operations roles for nuclear remediation at the Savannah River Site and the Hanford Site ^[17]
• Operation of the Waste Isolation Pilot Plant - the US nuclear waste repository
• Elimination of chemical and biological weapons under the Nunn–Lugar Cooperative Threat Reduction Program as well as the creation of labs to study diseases ^[18]
• Operates the Nevada Test and Training Range ^[19]
• Operations of the Kennedy Space Center

See also

• Top 100 Contractors of the U.S. federal government

References

1. "Key Locations". amentum.com. Retrieved 4 June 2023.
2. "Amentum to Acquire PAE Incorporated". Business Wire. 2021-10-25. Retrieved 2023-10-27.
3. Staff Writer (2022-02-24). "John Heller Tapped as Amentum CEO". WashingtonExec. WashingtonExec. Retrieved 2022-07-06.
4. Chanel (2023-02-07). "Amentum Awarded $487M Contract to Deliver Logistics Solutions for U.S. Military Equipment". Amentum. Retrieved 2023-02-23.
5. "Key Locations". Amentum. Retrieved 2023-02-23.
6. Wilkers, Ross (2020-02-04). "What's next for 'Amentum' after AECOM spinoff". Washington Technology. Washington Technology. Retrieved 2022-07-06.
7. Leuthy, Cameron; Levinson, Rob (2021-06-01). "The 200 government contractors shaping the federal market". Bloomberg Government. Bloomberg. Retrieved 2022-07-06.
8. AECOM (2020-01-30). "Management Services Sale". Press Releases. Retrieved 2022-07-06.
9. APDR (2024-10-02). "Amentum merges with Jacobs' units". APDR. Retrieved 2025-07-10.
10. Tiron, Roxana (September 27, 2024). "Amentum Seeks Greater Space, Tech Reach As Public Trading Debuts". Bloomberg Government.
11. https://www.marketwatch.com/story/lockheed-martin-to-buy-amentum-s-hardware-business-for-360-million-99ff5bef
12. Blinde, Loren (2025-06-27). "Lockheed Martin acquires Amentum's Rapid Solutions business". Intelligence Community News. Retrieved 2025-07-06.
13. Wilkers, Ross (2020-09-28). "How the Amentum-DynCorp deal came to be in a COVID world". Washington Technology. Washington Technology. Retrieved 2022-07-06.
14. Biesecker, Cal (2020-11-24). "Amentum Closes Deal For DynCorp". Defense Daily. Defense Daily. Retrieved 2022-07-06.
15. Losey, Stephen (2022-02-15). "Amentum closes $1.9 billion acquisition of PAE". DefesneNews. DefenseNews. Retrieved 2022-07-06.
16. Keller, Katie (2021-01-07). "Amentum Awarded US Army Contract for Flight and Simulator Training". ClearanceJobs. ClearanceJobs. Retrieved 2022-07-06.
17. Barber, Wayne (2020-02-07). "Amentum is New Name With Familiar Faces to DOE Crowd, Executive Says". Exchange Monitor. Exchange Monitor. Retrieved 2022-07-06.
18. Pasternack, Alex (2013-08-29). "Why The U.S. Is Building A High-Tech Bubonic Plague Lab In Kazakhstan". Motherboard. Popular Science. Retrieved 2022-07-06.
19. Wilkers, Ross (2018-05-23). "AECOM books $3.1B test range services contract". Washington Technology. Washington Technology. Retrieved 2022-07-12.

External links

• Official website
• Business data for Amentum Holdings, Inc.:
  • Google
  • SEC filings
  • Yahoo!
• Amentum recruits for Washington's acoustic intelligence battle with China in Pacific, Intelligence Online, May 9, 2024 (requires free registration)