AtkinsRéalis secures multi-year nuclear partnership with Rolls-Royce Submarines
Montreal: 5 December, 2025 – AtkinsRéalis Group Inc. (TSX: ATRL), a world-class engineering services and nuclear company with offices around the world, has been appointed to deliver nuclear propulsion and engineering capabilities to Rolls-Royce Submarines Limited, supporting the UK’s growing submarines program.
Under this framework agreement, AtkinsRéalis will work alongside Frazer-Nash and Assystem to provide Rolls-Royce Submarines with the collective engineering expertise, nuclear capabilities, and other professional services required to meet growing demand from the UK Ministry of Defence (MoD) and allied nations. The framework has a total value of up to £400 million over five years, with the option to extend for a further two years.
The Capability Assured Strategic Partnership (CASP) brings together nuclear capability to support the Royal Navy’s submarines program and the UK’s wider Defence Nuclear Enterprise. The UK Government has reaffirmed its commitment¹ to nuclear as a cornerstone of its national security strategy, investing significantly to maintain and expand its world-class submarine program and enable the trilateral AUKUS security agreement, which will support Australia in acquiring its first conventionally armed, nuclear-powered submarine fleet².
“Global defence investment is accelerating as nations seek to reinforce security and resilience,” said Ian L. Edwards , President and CEO of AtkinsRéalis. “AtkinsRéalis is uniquely positioned to support this growth through our multidisciplinary expertise in nuclear programs and complex infrastructure. This partnership with Rolls-Royce Submarines reflects our ability to deliver highly specialized capabilities that are critical to the safe and effective operation of future submarine fleets and wider defence programs.”
“Nuclear propulsion systems for submarines require exceptional precision, safety, and technical depth,” said Joe St. Julian, President, Nuclear, AtkinsRéalis. “Our position in this new strategic partnership builds on 27 years working with Rolls-Royce Submarines on their defence programs and our end-to-end experience in nuclear lifecycle management. Together with our industry partners, we will help ensure the UK’s submarine enterprise remains robust, agile, and ready to meet evolving defence needs.”
Under the new partnership, AtkinsRéalis will provide specialist support in nuclear propulsion systems, safety assurance, systems engineering, and program delivery—critical for the design, integration, and lifecycle management of submarine reactor plants—alongside consulting, environmental services, asset management, cyber resilience, digital solutions, and reactor design and substantiation.
The appointment follows AtkinsRéalis and Mott MacDonald being announced as Rolls-Royce Submarines’ joint fissile design partner in January 2025, as part of plans to double the size of its submarines site in Derby, England. Combined, these appointments demonstrate AtkinsRéalis’ ongoing and growing role in supporting the UK’s Defence Nuclear Enterprise and its commitment to delivering safe, reliable propulsion capability for future submarine fleets.
Rolls-Royce Submarines is currently supporting the existing Astute and Dreadnought boat build programs through the delivery of reactor plant and associated components. In March 2023, it was confirmed that Rolls-Royce Submarines would provide all the nuclear reactor plants that will support the next generation of nuclear-powered submarines as part of the trilateral AUKUS agreement between Australia, the UK and US².
Notes to editors
AtkinsRéalis is providing design and engineering services to the new GW-scale nuclear build program at Hinkley Point C and Sizewell C, as well as working on operations, maintenance, decommissioning and nuclear waste management at nuclear sites across the UK.
Through its global defence market, AtkinsRéalis supports critical defence programs to strengthen national security, from infrastructure design and complex program delivery to strengthening cyber resilience in the face of evolving threats. In the UK, AtkinsRéalis has supported the UK Ministry of Defence (MoD) in major programs across the land, maritime, air and joint environments and is one of three firms jointly appointed as Engineering Delivery Partners to the MoD’s Defence Equipment & Support (DE&S) function.
¹ Source: GOV.UK, https://www.gov.uk/government/news/defence-secretary-backs-britains-nuclear-deterrent-for-generations-to-come-as-he-joins-returning-submarine-patrol
² Source: Rolls-Royce, https://www.rolls-royce.com/media/press-releases/2023/13-03-2023-nuclear-reactors-from-rolls-royce-to-power-australian-submarines.aspx
About AtkinsRéalis
Created by the integration of long-standing organizations dating back to 1911, AtkinsRéalis is a world-class engineering services and nuclear company dedicated to engineering a better future for our planet and its people. We create sustainable solutions that connect people, data and technology to transform the world's infrastructure and energy systems. We deploy global capabilities locally to our clients and deliver unique end-to-end services across the whole life cycle of an asset including consulting, advisory & environmental services, intelligent networks & cybersecurity, design & engineering, procurement, project & construction management, operations & maintenance, decommissioning and capital. The breadth and depth of our capabilities are delivered to clients in strategic sectors such as Engineering Services, Nuclear and Capital. News and information are available at www.atkinsrealis.com or follow us on LinkedIn.
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Isn't this the same company Trudeau had to intervene with the attorney General due to evidence of bribery payouts? Formerly known as SNC Lavalin Group?