New York-listed Amentum has announced plans to create 3,000 new jobs in the UK over the next four years, driven by growth in nuclear power and defence.

CEO John Heller, following meetings with President Donald Trump and Prime Minister Sir Keir Starmer, emphasised the importance of UK-US collaboration in energy resilience and national security.

The company is a key delivery partner for the UK’s nuclear power stations at Hinkley Point C and Sizewell C, and is advancing work on small modular reactors and fusion research.

It expects to increase its UK headcount by 50% while investing in digital engineering, AI and automation to strengthen critical infrastructure and defence programmes across both nations.