Amentum Holdings, Inc. provides engineering and technology solutions to the U.S. and allied government agencies. It offers supporting programs of critical national importance across energy and environmental, intelligence, space, defense, civilian, and commercial end-markets. It offers a range of capabilities, including environment and climate sustainability, intelligence and counter threat solutions, data fusion and analytics, engineering and integration, advanced test, training and readiness, and citizen solutions. The company was incorporated in 2023 and is headquartered in Chantilly, Virginia.