Assystem SA is a France-based company that is principally engaged in engineering and innovation consultancy. The Company is structured along following sectors: Aerospace, Defence, Energy, Nuclear, Life Sciences, Infrastructure and Transport. The Company develops its expertise in complex infrastructural engineering and externalized R&D services. It's activities include managing infrastructural investments, from conception to dismantling; aerospace mechanical engineering, providing technical services to aerospace, engine and automotive manufacturers and technology & product engineering, providing services in transport, defense, product hardware and software development. The Company is present Europe, North America and Asia. It operates through several subsidiaries, including Eurosyn Developpement, Assystem Iberia and Assystem Romania, among others. In April 2014, HDL Developpement SAS raised its interest to 85.41% from 29.22% by acquiring a 56.19% interest in the Company.