CS Group is the French leader in air traffic control, the third-biggest supplier of traffic-management systems in the world[1] and provides information technology consulting services.

[4] In nuclear safety and radioactive waste management, CS Group produces high-performance simulators and creates specialized scientific software.

; engineering, development and integration, maintenance, testing, and certification services for aeronautics, automobiles, energy, mobile phones, railway transportation, etc.

Further, it offers technical information systems comprising technical documentation and respect for production constraints; security systems for encryption and implementation in networking equipment, identification and validation, non-reversible transactions, data and interchange confidentiality, secured application flows, and rights management and attribution; and radio-telephone-intercom integrated solutions.

CS Group develops a computational fluid dynamics software solution[buzzword] based on the Lattice-Boltzmann method: ProLB.