Interior architect and trained designer (graduate of ESAG Penninghen), Grégoire has worked at the agency of Bruno Moinard, Noé Duchaufour Lawrence, and Gilles & Boissier where he was able to work on major projects such as the Hermès headquarters in Paris, Cartier boutiques, a private mansion for Veuve Clicquot, and more recently the restaurant Ciel de Paris at the top of the Montparnasse tower.