Amentum Holdings, Inc. (NYSE: AMTM) is a global advanced engineering and technology solutions company serving U.S. federal customers across defense, intelligence, energy, space, and civilian missions, with allied work in the United Kingdom and Australia. The company was created from the spin-off of AECOM's Management Services business in 2020 and on September 27, 2024 completed a Reverse Morris Trust transaction with Jacobs Solutions to merge Jacobs' Critical Mission Solutions (CMS) and Cyber & Intelligence (C&I) businesses into Amentum. Post-merger Amentum reports approximately $14.4 billion in FY2025 revenue, a $47.1 billion backlog, ~53,000 employees in 80 countries, and is headquartered in Chantilly, Virginia.
Investor Relations: https://investors.amentum.com (NYSE: AMTM)
APIs.yml: View APIs Index
- Type: Index
- Position: Consuming
- Access: 3rd-Party
Federal Services, Defense IT, National Security, Intelligence, Space Systems, Nuclear, Energy, Environmental Services, Engineering Services, Cyber, Digital Transformation, Government Contractor
No public APIs or developer portal have been identified for Amentum. The company delivers software, IT modernization, mission systems, and engineering work under contract through classified, CAC-gated, or program-specific portals. There is no public OpenAPI, REST API, SDK, or sandbox surface to profile.
- Mission Modernization & Sustainment — lifecycle engineering, operations, training, logistics, and sustainment across all warfighting domains
- Space Systems — prime contractor for NASA's Exploration Ground Systems Program at Kennedy Space Center (Artemis)
- Digital Transformation — IT modernization, cloud, software engineering, data platforms, managed services
- Sustainability & Environment — environmental remediation, climate resilience, hazardous waste, munitions response
- Advanced Energy Solutions — nuclear, clean energy, and energy infrastructure including Owner's Engineer for the UK's first Small Modular Reactors
- Data Analytics & Cyber — mission cyber, intelligence analytics, and AI/ML inherited from Jacobs' Cyber & Intelligence portfolio
U.S. Department of Defense (Army, Air Force, Navy & Marine Corps, SOCOM), the U.S. Intelligence Community, NASA, U.S. Department of Energy (LLNL, INL), U.S. Department of Homeland Security (USCIS biometrics at 130 locations), allied governments (UK MoD, Australia), and U.S. civilian customers (CAL FIRE).
- Sept 2024 — Reverse Morris Trust merger with Jacobs CMS and C&I closed; began trading as NYSE: AMTM
- FY2025 — Reported ~$14.4B revenue and $47.1B backlog; GAAP revenue up ~70% year-over-year driven by the merger
- $425M CAL FIRE contract — aerial firefighting operations support
- $406M UK SMR contract — Owner's Engineer role for the UK's first Small Modular Reactors (joint venture)
- Artemis II support — launch and recovery operations at Kennedy Space Center
- Amentum Technology, Inc. (formerly Jacobs Technology Inc.)
- Amentum Digital Infrastructure, Inc. (formerly Jacobs Telecommunications Inc.)
- Created: 2026-05-23
- Modified: 2026-05-23
FN: Kin Lane
Email: kin@apievangelist.com