Assystem SA

Assystem S.A. is a global engineering and project management firm specializing in complex and critical infrastructure projects. The company partners with public sector entities and utility providers, offering comprehensive engineering services from project initiation, design, and construction through to long-term operations. Its extensive service portfolio includes digital, systems, and general engineering, procurement, construction management, and project management consulting. Assystem also delivers specialized solutions such as industrial control systems, site assessment and permitting studies, research and analysis, digital field services, industrial data science, and compliance, safety, and security services. These capabilities serve a diverse range of sectors, including nuclear, energy, transportation, defense, and general buildings and infrastructure. Additionally, the company provides end-of-life services like decommissioning, waste management, integration, and ongoing maintenance. Established in 1966 and headquartered in Courbevoie, France, Assystem S.A. operates as a subsidiary of HDL Development, having rebranded from AssystemBrime S.A. in June 2005.