Sirat was allowed to attend schools during the Vichy government despite being a Jew because his father fought at Verdun in World War I.

Sirat would later serve as a translator for President Charles de Gaulle, and co-founded the University Center for Jewish Studies.

[6] In 1999, he co-founded the Fondation pour la recherche et le dialogue interreligieux et inter-culturels in Geneva alongside Joseph Ratzinger and the Ecumenical Patriarchate of Constantinople.

[7] In 2000, Sirat gained the attention of President of the United States Bill Clinton for the foundation of the Faculty of Book Religion at the University of France of Morocco.

He was a supporter of UNESCO's Project Aladdin, was a member of the Israelite Central Consistory of France, and served as president of the Académie Hillel.