Assystem is one of the world's leading independent nuclear engineering companies, ranked among the top three globally in its field. With nearly 60 years of operating history and approximately 8,000 employees, the firm maintains a presence across 13 countries spanning Europe, Asia, Africa, and the Middle East. Its work focuses on accelerating the energy transition, with particular expertise in nuclear engineering, advanced reactor technologies, and digital transformation.
The company's scope covers the entire nuclear lifecycle - from new builds and advanced reactor technologies to operations, maintenance, and decommissioning. Assystem participates in every major EPR (European Pressurized Reactor) construction project worldwide. Beyond nuclear, its technical domains extend to renewable energy, hydrogen, power grids, and transportation infrastructure.
Assystem also provides digital and engineering services aimed at delivering safer and more competitive infrastructure programmes. Its work supports both established nuclear programmes and emerging energy technologies, positioning the firm at the intersection of heavy engineering and digital innovation in the energy sector.
