Assystem is one of the world's leading independent nuclear engineering companies, with a clear and urgent mission: to accelerate the energy transition and fight climate change. For nearly 60 years, the company has been at the forefront of nuclear innovation, participating in every major EPR (European Pressurized Reactor) construction project globally. With 8,000 employees across 13 countries spanning Europe, Asia, Africa, and the Middle East, Assystem operates as a key partner to the world's largest industrial groups including EDF, Framatome, ITER, Rolls Royce, and Naval Group.
The company combines deep engineering expertise with digital transformation capabilities to deliver safer, more competitive, and eco-friendly infrastructure programs. Assystem's work spans the entire nuclear lifecycle - from new builds and advanced reactor technologies to operations, maintenance, and decommissioning - as well as renewable energy, hydrogen, power grids, and transportation sectors. Ranked among the top three nuclear engineering companies worldwide, Assystem continues to push forward the development of low-carbon energy solutions through its engineering, project management, and digital services.