Ponsot qualified as a crew member for the French squad in the Star class at the 2012 Summer Olympics in London by finishing ninth and receiving a berth from the ISAF World Championships in Perth, Western Australia. Teaming with his partner Rohart in the opening series, the French duo delivered a powerful lead in the first leg, but came up short for the podium with an accumulated net score of 86 points and a satisfying ninth position against a fleet of sixteen boats.