Prosix Engineering

Prosix Engineering is a Spanish aerospace engineering company headquartered in Donostia-San Sebastián, Gipuzkoa, Basque Country, specialising in the design and manufacture of deployable space structures and composite structural components for satellites and spacecraft. The company's core products include carbon fibre reinforced plastic (CFRP) deployable masts, booms, antenna reflectors, carbon fibre feeds, and structural struts, engineered for space applications requiring extreme precision, lightweighting, and mechanical reliability in harsh thermal and radiation environments. Prosix also develops structural health monitoring systems using embedded fibre optic sensor technology in composite structures, serving satellite manufacturers, space agencies, and aerospace integrators across Europe.