ONERA is France's national aerospace research centre, based in Paris. The organisation conducts scientific research and testing across aeronautics, space and defence, with particular expertise in aerodynamics, materials, fluid mechanics, electromagnetics, radar and information systems. They operate wind tunnels and testing facilities where they conduct advanced measurement and simulation work on aircraft, missiles, helicopters and spacecraft. If you work with companies needing specialised aerospace research, testing or engineering support, ONERA would be a natural referral.