Rolls-Royce SMR and Amentum have signed a collaborative agreement to build these SMRs, with Amentum selected as the programme delivery partner for the first deployments of the Rolls-Royce SMRs.

In the UK, Rolls-Royce SMR said it will deliver up to 1.5GW of low-carbon energy to the grid, supporting the UK’s net zero goals and creating more than 8,000 long-term jobs in the country.

Amentum will be responsible for integration, oversight and governance, construction management and execution of the SMR deployment. The company, which is a global leader in advanced engineering and technology solutions, will deploy its full nuclear life cycle experience to oversee multi-functional programme execution and integrated planning to support the on-time and on-budget delivery of SMR-generated power.

“The Amentum Rolls-Royce SMR collaboration advances the deployment of this transformational technology, a critical enabler in strengthening energy security in the UK and continental Europe,” said John Heller, CEO of Amentum.

“Amentum brings its industry-leading expertise as a project delivery partner for complex energy infrastructure to the forefront of small modular reactor deployment, ushering in the next generation of clean, reliable energy.”

The news comes as SMRs are being touted as a new and innovative solution for the data centre industry, with companies actively looking towards these cleaner strategies to support sustainable growth.

Both the UK and Czech Republic have been working together for some time on SMRs to seize opportunity, support highly-skilled jobs, boost economic growth and deliver clean, homegrown energy – particularly as part of the UK’s Plan for Change.

UK Prime Minister Keir Starmer and Czech Prime Minister Petr Fiala last year signed a first-of-a-kind partnership, hoping to lead the global race on SMRs.

Rolls-Royce was selected to build the first SMRs in the UK and is actively working to cut fossil fuel reliance in global data centre operations, having also previously signed agreements to develop SMRs in the Czech Republic.

With global electricity demand expected to double in the future, Rolls-Royce SMR is hoping to offer a radically different approach to new nuclear – smaller, scalable factory-built nuclear power plants that can be deployed, using a modular approach, for a range of applications.

Amentum, which has been working with Rolls-Royce since 2026, will now support the development of a fleet of Rolls-Royce SMRs to support growing energy requirements and drive long-term industrial growth.

“By working with Amentum, we are combining our skills to build a powerful team that will enable successful delivery on our order commitments in multiple markets,” said Rolls-Royce SMR chief executive Chris Cholerton. “We have secured a world‑leading partner that is fully invested in our success.

“This partnership plays directly to our strengths – ours in advanced manufacturing and engineering, and theirs in programme and construction excellence. It is a truly synergistic relationship that strengthens our overall offering.”

Ruth Todd CBE, Rolls-Royce SMR’s operations and supply chain director, added: “This partnership supplements our existing capabilities with specialist expertise, geographical reach and provides access to the breadth of Amentum’s wider supply chain.

“It ensures we are equipped to deliver our programmes in the UK, Czech Republic, in Sweden and globally with confidence, scale and robust delivery assurance. The Amentum-Rolls-Royce SMR collaboration advances our deployment plans significantly.”

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