In 1994, Prasquier began his activities with the Conseil représentatif des institutions juives de France (CRIF), the umbrella body of Jewish communities and organizations in France. He became head of the CRIF liaison group with the Catholic Bishop's Conference of France as well as the CRIF International Relations Committee. He also served on the board of the Fondation pour la Mémoire de la Shoah headed by Simone Veil, and in 1997 he became chairman of the French Committee for Yad Vashem.