Guillaume PROUTEAU

Guillaume Prouteau is Legal Counsel at Arianespace, the launch operator of Ariane 6 from the European Spaceport in French Guiana, with offices in Tokyo, Singapore, and Washington, DC. In this role, he oversees the legal structuring of the company’s global service offerings, which involve sophisticated contractual frameworks negotiated with a diverse range of stakeholders — from leading international institutions to fast-growing emerging New-Space players.

Operating in a sector shaped by increasing commercial competition and geopolitical sensitivities, he ensures that legal strategy not only safeguards the company’s interests but also creates sustainable value for its partners. As in-house counsel, he plays a key role at the intersection of law, business development, and international regulatory dynamics.