Assystem is an international engineering and digital services company with a long‑established presence in the United Kingdom. Operating in the UK since 1996, it supports major national programmes across low‑carbon energy, transport and critical infrastructure. The company plays a significant role in helping the UK progress towards its 2050 carbon‑neutrality target, contributing engineering expertise, project management capability and digital solutions to large‑scale, technically complex programmes.
A core part of Assystem’s UK activity is its work in the nuclear sector, where it is a major contributor to new‑build, fusion and decommissioning projects. The company is a key engineering partner for Hinkley Point C, a member of the Sizewell C consortium and an active participant in the UK Small Modular Reactor programme. It also supports the UK Atomic Energy Authority’s fusion research at Culham and provides specialist engineering and safety expertise for the decommissioning of Sellafield, the country’s most complex nuclear site.
Beyond nuclear, Assystem contributes to the UK’s wider energy transition and infrastructure development. Its engineers support renewable energy projects, including the design and deployment of large‑scale submarine cable systems, and the company plays a role in decarbonising the transport sector through rail safety consultancy, project management and environmental services. Assystem also provides engineering and digital services to defence clients, including support to the UK’s naval nuclear programme.
Assystem publicly states its commitment to the Armed Forces community through its support of the Armed Forces Covenant. The company recognises the valuable skills and experience that serving personnel, reservists, veterans and military families bring to engineering and technical environments. Its commitment includes fair treatment, inclusive employment practices and ensuring that members of the Armed Forces community face no disadvantage in recruitment or career progression, aligning with its broader values of responsibility and supporting national capability.