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Amentum Holdings

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Amentum Holdings, Inc.
TypePublic
IndustryNational security, defense, healthcare, engineering
Predecessor
FoundedFebruary 4, 2020
(6 years ago) (2020-02-04) in Germantown, Maryland
HeadquartersChantilly, Virginia, U.S.,
Area served
Worldwide
Key people
John Heller (CEO)[1]
ProductsGovernment services
RevenueIncrease US$14.4 billion (2025)
Increase US$480 million (2025)
Increase US$66 million (2025)
Owner
Number of employees
> 53,000 (2025)
Websiteamentum.com
Footnotes
[2][3][4][5]

Amentum Holdings, Inc. (formally Amentum Government Services Holding LLC) is an American government and commercial services contractor based in Chantilly, Virginia.[6][7] The company was formed in 2020 from the spinout of AECOM's Management Services / federal group.[8] After Leidos, it is the second-largest government services (non-equipment producing) contractor in the US government contracting market.[9]

History

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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 markets.[10]

In March 2024, Amentum announced the completion of its merger with Jacobs Solutions's Critical Mission Solutions and Cyber and Intelligence businesses.[11] In September 2024, it became a publicly traded company on the NYSE under the ticker symbol "AMTM", becoming a part of the S&P 500.[12]

On April 23, 2025, Lockheed Martin announced it had agreed to buy Amentum's Rapid Business Solutions Business for $360 million.[13][14] The deal was closed in June 2025.[15]

As of 2025, the company reported revenue of approximately $14.4 billion and a total backlog of $47.1 billion, with around 50,000 employees operating in more than 70 countries.[16] Amentum operates through two primary business segments: digital services and global engineering.[17][18]

Growth through acquisitions

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

Operations

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Amentum provides engineering, logistics, and technical services primarily to U.S. government agencies and allied partners. Its work includes defense support services, nuclear security and environmental remediation, space operations,[22] and intelligence and cybersecurity.

The company operates through two msegments: digital services, which includes intelligence analysis, cybersecurity, and space systems support; and global engineering, which includes nuclear remediation, infrastructure engineering, and sustainment services.[17][23]

Major programs and contracts

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Nuclear and environmental remediation

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Amentum is involved in environmental cleanup and nuclear waste management at multiple U.S. Department of Energy sites. At the Hanford Site in Washington state, the company participates in the Washington River Protection Solutions joint venture managing radioactive tank waste, including treatment and preparation of waste for vitrification.[24][25]

At the Oak Ridge Reservation in Tennessee, Amentum leads United Cleanup Oak Ridge LLC (UCOR), a joint venture with Jacobs and Honeywell that holds the Department of Energy's environmental cleanup contract for the site. The 10-year contract, awarded in 2021 with an estimated ceiling of approximately $8.3 billion, covers cleanup and remedial actions at the East Tennessee Technology Park, cleanup of excess facilities at Oak Ridge National Laboratory and the Y-12 National Security Complex, and the design, construction, and operation of the Environmental Management Disposal Facility. The cleanup work has supported reindustrialization and economic redevelopment of the former Oak Ridge Gaseous Diffusion Plant site.[26] In 2025, Amentum announced a Nuclear Center of Excellence in Oak Ridge to serve as a hub for its nuclear engineering work.[27]

Amentum previously held a contract to operate the Waste Isolation Pilot Plant in New Mexico until 2023, when operations were given to a different contractor.[28]

International nuclear programs

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In the United Kingdom, Amentum provides program and project management services for new nuclear energy construction, including work at Hinkley Point C and Sizewell C, where the company serves as the sole programme and project management partner.[29] Amentum also provides engineering support at Sellafield, Britain's largest nuclear decommissioning site.[30]

The company has additional history in UK nuclear decommissioning. From 2012 until 2021, Amentum was part of the Cavendish Dounreay Partnership consortium (with Cavendish Nuclear and Jacobs) that served as the parent body organization of Dounreay Site Restoration Ltd, responsible for the cleanup of Britain's former fast reactor research center in Scotland. From 2008 until 2021, Amentum was the majority partner of UK Nuclear Waste Management Ltd, the consortium operating the Low Level Waste Repository in West Cumbria, the UK's national facility for the disposal of low-level radioactive waste. Both entities transitioned to wholly owned subsidiaries of the Nuclear Decommissioning Authority in 2021.[31][32][33]

Amentum has also supported international decommissioning efforts, including a partnership with Tokyo Electric Power Company on cleanup activities at the Fukushima Daiichi Nuclear Power Plant.[34][35]

Defense and training

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Amentum provides flight training services for the United States Army Aviation Center of Excellence at Fort Novosel in Dale County, Alabama. The company has also participated in the Cooperative Threat Reduction program supporting chemical, biological, radiological, and nuclear threat reduction.[36][37]

Defense sustainment contracts

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In September 2025, Amentum was awarded a U.S. Air Force contract with a ceiling value of approximately $995 million to provide maintenance support for the MQ-9 Reaper fleet.[38][39]

International stability operations

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Amentum has supported humanitarian, disaster response, and contingency operations for the U.S. government and the United Nations, with a global footprint that has included work across more than 30 African countries, as well as Iraq, Afghanistan, Bangladesh, and Antarctica. The company's portfolio in this area includes constructing humanitarian camps, operating Ebola treatment units in Liberia, building roads and airstrips in South Sudan, and standing up a 200-bed COVID-19 alternate care facility in New Jersey in 2020.[40][41]

In 2021, under the Air Force Contract Augmentation Program V, Amentum supported the U.S. Department of Homeland Security's Operation Allies Welcome by helping build and sustain Liberty Village at Joint Base McGuire–Dix–Lakehurst in New Jersey, providing medical screening, temporary housing, and other services for more than 16,000 Afghan evacuees. In 2022, the U.S. Agency for International Development awarded an Amentum subsidiary a five-year, $44.6 million task order to support regional disaster management and risk reduction programs across 31 countries in Latin America and the Caribbean for the Bureau for Humanitarian Assistance.[42][43][44]

Amentum's federal work also includes contracts for the care, housing, and transportation of populations in federal custody or assistance. In 2023, the company was selected for a multiple-award $75 billion ceiling contract with the U.S. Department of Health and Human Services' Office of Refugee Resettlement, providing facilities and direct care services for unaccompanied refugee minors. In March 2026, Amentum received a $453 million contract from U.S. Immigration and Customs Enforcement covering housing and medical care at Camp East Montana in Fort Bliss near El Paso, Texas.[45]

Space operations

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Amentum is the main contractor for NASA's Exploration Ground Systems program at Kennedy Space Center. The program supports launch infrastructure, vehicle integration, and ground systems for missions within the Artemis program. The company supported integration and launch operations for Artemis I in 2022 and has continued work on Artemis II, including ground systems testing and launch preparation.[46][47]

Amentum supported the uncrewed Artemis I mission in 2022, and for the crewed Artemis II mission in 2026 its responsibilities spanned the full mission cycle: the company's Closeout Crew strapped the four astronauts into the Orion spacecraft and sealed the hatch before liftoff, and an Amentum-led recovery team operated alongside NASA aboard the USS John P. Murtha to retrieve the crew module after splashdown in the Pacific Ocean on April 10, 2026.[48][49][50][51]

In May 2025, the U.S. Space Force awarded Amentum a 10-year contract with a ceiling value of approximately $4 billion to operate and maintain the service's Eastern and Western launch ranges at Cape Canaveral Space Force Station in Florida and Vandenberg Space Force Base in California. The Space Force Range Contract covers oversight of launch facilities, radar sites, and flight-tracking systems supporting government and commercial launch customers, and is part of the Space Force's effort to operate the ranges as spaceports capable of accommodating rising launch demand.[52][53][54]

See also

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References

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  1. ^ "Board of Directors". Amentum. Retrieved 2026-05-06.
  2. ^ "Key Locations". amentum.com. Retrieved 4 June 2023.
  3. ^ "Amentum to Acquire PAE Incorporated". Business Wire. 2021-10-25. Retrieved 2023-10-27.
  4. ^ "Amentum Reports Fiscal Year 2025 Results". businesswire.com. Retrieved 2025-12-30.
  5. ^ Staff Writer (2022-02-24). "John Heller Tapped as Amentum CEO". WashingtonExec. WashingtonExec. Retrieved 2022-07-06.
  6. ^ Chanel (2023-02-07). "Amentum Awarded $487M Contract to Deliver Logistics Solutions for U.S. Military Equipment". Amentum. Retrieved 2023-02-23.
  7. ^ "Key Locations". Amentum. Retrieved 2023-02-23.
  8. ^ Wilkers, Ross (2020-02-04). "What's next for 'Amentum' after AECOM spinoff". Washington Technology. Washington Technology. Retrieved 2022-07-06.
  9. ^ Leuthy, Cameron; Levinson, Rob (2021-06-01). "The 200 government contractors shaping the federal market". Bloomberg Government. Bloomberg. Retrieved 2022-07-06.
  10. ^ AECOM (2020-01-30). "Management Services Sale". Press Releases. Retrieved 2022-07-06.
  11. ^ APDR (2024-10-02). "Amentum merges with Jacobs' units". APDR. Retrieved 2025-07-10.
  12. ^ Tiron, Roxana (September 27, 2024). "Amentum Seeks Greater Space, Tech Reach As Public Trading Debuts". Bloomberg Government.
  13. ^ Wilkers, Ross (2025-04-23). "Lockheed to acquire Amentum product unit for $360M". Washington Technology. Retrieved 2026-05-15.
  14. ^ "LM Completes Acquisition of Amentum's Rapid Solutions Portfolio". ASDNews. 2025-06-26. Retrieved 2026-05-15.
  15. ^ Blinde, Loren (2025-06-27). "Lockheed Martin acquires Amentum's Rapid Solutions business". Intelligence Community News. Retrieved 2025-07-06.
  16. ^ "Amentum Holdings Inc (AMTM) Q4 2025 Earnings Call Highlights". Yahoo. 2025-11-25. Retrieved 2026-05-15.
  17. ^ a b "Amentum Holdings, Inc. form 10-K" (PDF). Retrieved 2026-05-15.
  18. ^ Jamison, Miles (2025-11-26). "Amentum Posts $3.9B in Q4 2025 Revenue". GovCon Wire. Retrieved 2026-05-15.
  19. ^ 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.
  20. ^ Biesecker, Cal (2020-11-24). "Amentum Closes Deal For DynCorp". Defense Daily. Defense Daily. Retrieved 2022-07-06.
  21. ^ Losey, Stephen (2022-02-15). "Amentum closes $1.9 billion acquisition of PAE". DefesneNews. DefenseNews. Retrieved 2022-07-06.
  22. ^ Erwin, Sandra (2025-08-22). "Amentum begins work at U.S. space launch ranges after protest is withdrawn". SpaceNews. Retrieved 2026-05-15.
  23. ^ "Amentum Holdings, Inc. filing". SEC.gov. 2024-09-27. Retrieved 2026-05-15.
  24. ^ "New Era In Hanford Tank Waste Treatment". Energy.gov. 1970-01-01. Retrieved 2026-05-15.
  25. ^ "WRPS overcomes challenges to move cleanup mission forward". Tri-Cities Area Journal of Business. 2023-04-13. Retrieved 2026-05-15.
  26. ^ "Amentum Team Awarded $8.3 Billion Oak Ridge Reservation Cleanup Contract". Business Wire. 2021-10-27. Retrieved 2026-05-15.
  27. ^ "Amentum Announces Nuclear Center of Excellence in Oak Ridge, TN". Amentum. 2025-05-08. Retrieved 2026-05-15.
  28. ^ Barber, Wayne (2023-02-09). "Bechtel's Salado formally takes control of WIPP". ExchangeMonitor. Retrieved 2026-05-15.
  29. ^ "Amentum awarded Sizewell C project management contract". World Nuclear News. 2025-03-05. Retrieved 2026-05-15.
  30. ^ "Sellafield Ltd and TEPCO extend decommissioning partnership". GOV.UK. 2025-09-12. Retrieved 2026-05-15.
  31. ^ "Amentum awarded further UK contracts by EDF". World Nuclear News. 2026-01-28. Retrieved 2026-05-15.
  32. ^ "DSRL and LLWR to become NDA subsidiaries". GOV.UK. 2020-07-10. Retrieved 2026-05-15.
  33. ^ "Nuclear Decomissioning – United Kingdom". Amentum. 2025-09-25. Retrieved 2026-05-15.
  34. ^ The Yomiuri Shimbun (2026-05-15). "US firm to build training hub in Japan's Fukushima nuclear plant for debris removal". Asia News Network – Bringing Asia Closer. Retrieved 2026-05-15.
  35. ^ "U.S. Firm to Build Training Hub in Fukushima N-plant for Debris Removal; Plans to Establish Training Center by 2029". The Japan News. 2026-02-18. Retrieved 2026-05-15.
  36. ^ Wilson, Gwen (2022-08-01). "Amentum Services awarded $13M additional contract for Fort Rucker training work". HeliHub.com. Retrieved 2026-05-15.
  37. ^ Smith, Kristen (2025-08-25). "Six Companies Secure Spots on $3.5B DTRA Contract". GovCon Wire. Retrieved 2026-05-15.
  38. ^ Hamilton, Jillian (2025-10-01). "Amentum Secures Nearly $1B Air Force Contract for Global MQ-9 Reaper Maintenance". ClearanceJobs. Retrieved 2026-05-15.
  39. ^ Wakeman, Nick (2025-10-01). "Amentum wins $955M contract to maintain Air Force's Reaper fleet". Washington Technology. Retrieved 2026-05-15.
  40. ^ Hoffman, Mary Louise (2022-12-16). "Amentum Receives 5-Year Task Order to Support USAID's Humanitarian Assistance Bureau; Karl Spinnenweber Quoted". GovCon Wire. Retrieved 2026-06-15.
  41. ^ "Member Spotlight: Amentum-PAE – Global Health Council". Global Health Council. 2025-07-20. Retrieved 2026-06-15.
  42. ^ Tyrer-Jones, Alex (2023-04-03). "Amentum secures $4.6B contract from US Air Force to modernize supply chain and procurement". 3D Printing Industry. Retrieved 2026-06-15.
  43. ^ "Amentum Team Awarded International Stability Operations Association Recognition; Rob Tillery Quoted". ExecutiveBiz. 2022-11-09. Retrieved 2026-06-15.
  44. ^ "Amentum Awarded $487M Contract to Deliver Logistics Solutions for U.S. Military Equipment". Business Wire. 2023-02-07. Retrieved 2026-06-15.
  45. ^ Foley, Ryan J. (2026-04-02). "Inspection finds dozens of violations of detention standards at a major immigration camp in Texas". AP News. Retrieved 2026-06-15.
  46. ^ "mentum Leads Successful Artemis II Rollout in Critical Preparation Phase of NASA Launch". Business Wire. Retrieved 2026-05-15.
  47. ^ Tiron, Roxana (2024-09-27). "Amentum Seeks Greater Space, Tech Reach As Public Trading Debuts". Bloomberg Government. Retrieved 2026-05-15.
  48. ^ Edwards, Brooke (2026-03-31). "Meet the last people the NASA Artemis II crew sees on launch day". floridatoday.com. Retrieved 2026-06-15.
  49. ^ Edwards, Brooke (2026-04-08). "How Artemis II splashdown and crew recovery works and what to expect". floridatoday.com. Retrieved 2026-06-15.
  50. ^ Neale, Rick (2026-04-28). "Help wanted: Amentum job fair set to support NASA's Artemis missions". floridatoday.com. Retrieved 2026-06-15.
  51. ^ "Amentum Leads Successful Artemis II Rollout in Critical Preparation Phase of NASA Launch". Business Wire. Retrieved 2026-06-15.
  52. ^ Tiron, Roxana (2024-09-27). "Amentum Seeks Greater Space, Tech Reach As Public Trading Debuts". Bloomberg Government. Retrieved 2026-06-15.
  53. ^ Wilkers, Ross (2025-06-03). "Amentum wins $4B Space Force range contract". Washington Technology. Retrieved 2026-06-15.
  54. ^ Albon, Courtney (2025-08-22). "Amentum to modernize launch operations through $4B Space Force contract". Defense News. Retrieved 2026-06-15.
[edit]
  • Official website
  • Business data for Amentum Holdings, Inc.:
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