AtkinsRealis secures multi-year nuclear partnership with Rolls-Royce Submarines

Executive Summary

• AtkinsRéalis has been appointed under a framework agreement to provide nuclear propulsion and engineering services to Rolls‑Royce Submarines, supporting the UK Ministry of Defence’s submarine programme.
• The Capability Assured Strategic Partnership (CASP) is valued at up to £400 million over five years, with an option to extend for two additional years.
• The agreement positions AtkinsRéalis alongside Frazer‑Nash and Assystem as a key supplier of nuclear lifecycle management, safety assurance, systems engineering and related consulting services for current (Astute, Dreadnought) and future submarine programmes, including the AUKUS‑linked fleet.

Key Details

• Framework Value: Up to £400 million total over five years; extension option for two more years.
• Scope of Services:
• Nuclear propulsion system support, safety assurance, systems engineering, program delivery.
• Consulting, environmental services, asset management, cyber‑resilience, digital solutions, reactor design and substantiation.
• Partners in the Framework: Frazer‑Nash and Assystem (jointly delivering expertise with AtkinsRéalis).
• Strategic Context: Aligns with UK Government’s commitment to nuclear defence, supporting the Royal Navy’s submarine fleet and the broader Defence Nuclear Enterprise; complements AUKUS security agreement.
• Previous Related Appointments: Earlier in 2025, AtkinsRéalis and Mott MacDonald were named joint fissile design partners for Rolls‑Royce Submarines (Derby site expansion).
• Current Programme Involvement: Rolls‑Royce Submarines is delivering reactor plants for the Astute and Dreadnought classes; the partnership will aid future nuclear‑powered submarine builds under AUKUS.

Notable Quotes

• “Global defence investment is accelerating as nations seek to reinforce security and resilience,” said Ian L. Edwards, President and CEO, AtkinsRéalis.
• “Nuclear propulsion systems for submarines require exceptional precision, safety, and technical depth,” said Joe St. Julian, President, Nuclear, AtkinsRéalis.