During his final-year project at Mer Forte, Antoine participated in the construction of François Gabart's (IMOCA, MACIF) 60-foot racing vessel. He also worked on developing a rigid sail prototype for catamarans with movable flaps that allow the sail to fill with wind or be trimmed when there are high winds.

After completing a technical diploma in Mechanical Engineering and Manufacturing, Sébastien attended the co-op engineering program at ENSTA Bretagne from 2007 to 2010. After graduating, he continued to work for his host company Constructions Mécaniques de Normandie (CMN), and he was later hired by DCNS to work on their submarine program.