Amentum to add 3,000 UK jobs

British Prime Minister Keir Starmer gave a shout-out to Chantilly-based government contractor Amentum Thursday at a business reception held during President Donald Trump‘s state visit to Britain..

During the trip, which included stops at Windsor Castle and St. George’s Chapel, Trump and Starmer signed the Tech Prosperity Deal, an agreement to invest joint resources and expertise into areas such as artificial intelligence and quantum computing. The deal was accompanied by pledges of more than $202 billion in U,K. investment including more than $121 billion from Blackstone, a private equity group.

“To fuel this revolution, we have also struck a new deal on civil nuclear power,” Starmer said at the business event held at Chequers, the prime minister’s country home. “I want to thank everybody here for supporting this too with brilliant, job-creating investments from Amentum and others.”

Specifically, Amentum announced plans to create 3,000 new jobs in the United Kingdom over the next four years in nuclear power and defense, an investment worth about $203 million according to the U.K.  A provider of advanced engineering and technology services, Amentum is a lead delivery partner for the U.K.’s new nuclear power stations at Hinkley Point C and Sizewell C. Additionally, Amentum provides technical and product solutions for small modular reactors and fusion research there.

Amentum CEO John Heller attended Thursday’s reception along with top U.S. executives like Apple CEO Tim Cook and Nvidia CEO Jensen Huang.

“The U.S. state visit reflects the unique strength of the U.K.-U.S. partnership and our shared determination to drive economic growth and prosperity,” Heller said in a statement.

Collaboration between the nuclear industries of the U.K. and the U.S. will help meet Trump’s goal of quadrupling nuclear generating capacity by 2050, Amentum stated in a news release.

Amentum assists U.K.’s national defense by providing services for the Royal Navy’s nuclear submarines, managing the U.K. training estate for the Defence Infrastructure Organization, part of the U.K.’s Ministry of Defence, and delivering program management and engineering support for Atomic Weapons Establishment, the U.K. equivalent to the National Nuclear Security Administration.

“We are stepping up collaboration between our people on both sides of the Atlantic to ensure that we seize opportunities which are tailor-made for our company,” Mark Whitney, president of Amentum Energy and Environment, stated in the news release. “Based on current demand projections, we expect to increase our U.K. head count by 50% over the next four years.  And we are also investing in digital engineering, AI and automation to improve the delivery of critical infrastructure and government programs in the U.K. and the U.S.”

More than 53,000 employees in about 80 countries work at Amentum. In the United Kingdom, the company has 6,000 employees. Amentum reported $3.6 billion in revenue for the third quarter of 2025.