CS Communication et Systemes is a contractor in the design, integration and operation of mission critical systems, and is focused on sectors such as: Defense, Space and Security (By combining information, systems interoperability and operations command, Co. leverages the deployment of mission-critical defense), Aeronautics (Co. conducts projects and develops and maintains technical information and real-time systems), Transportation (Co. offers solutions, spanning from roadside equipment to back-office systems, from integration to operation and maintenance support), and Energy and Industry (simulation, high performance computing, safety, risk management, and production data processing).