5 December 2025
Rolls-Royce Submarines Ltd (RRSL) has appointed Assystem as one of the three key industry partners on the Capability Assured Strategic Partnership (CASP).
In collaboration with AtkinsRéalis and Frazer-Nash Consulting, CASP represents a major step forward in bringing Assystem’s and its partners' industry capabilities together to supercharge the UK’s world-leading nuclear submarine programme.
Building on more than two decades of collaboration with RRSL, Assystem will help transform the way Rolls-Royce works with its supply chain by expanding on its existing expert engineering, project management and digital services.
As a UK Tier one supplier to the nuclear industry with 60 years of experience managing some of the world’s most complex nuclear projects, Assystem’s position on the framework will enable a more agile, capability-driven operating model that delivers long-term value for RRSL’s customers and strengthens the UK’s nuclear future.
A Collaborative Partnership
With a framework value of up to £400m, Assystem and partners will offer an innovative portfolio approach to contracting and management – promoting collaboration, simplification and capability growth. This approach prioritises trust and agility, allowing for greater sector efficiency while bolstering the UK’s long-term defence resilience.
Assystem is proud to strengthen our trusted partnership with Rolls-Royce Submarines through the CASP framework. As a partner to Rolls-Royce for several decades, Assystem, alongside its strategic partners, is providing real value for the successful delivery of their industry commitments and ambitious growth plans.
The CASP framework will play a key role in the delivery of the UK’s Defence Industrial Strategy for which, Assystem is fully supportive.
As a global nuclear player with 60 years’ experience, Assystem will bring its full life-cycle expertise and capability in engineering, project management, and innovative digital solutions to support the long-term success of the CASP framework.