Rabbi Schneier also served as U.S. Alternate Representative at the U.N. General Assembly in 1988 and as a member of the U.S. Delegation for Return of the St. Steven Crown to Hungary in 1979. In 2006, he became a member of the United Nations Alliance of Civilizations High-Level Group (UNAOC) and in 2008, he was appointed an ambassador to the UNAOC. That same year, Rabbi Schneier was the keynote speaker at an Interfaith Conference convened by King Abdullah of Saudi Arabia in Madrid. In 2009, he had a private audience with Pope Benedict XVI to reaffirm Nostra Aetate adopted by Vatican Council II. In April 2015, Rabbi Schneier was conferred a Papal knighthood by The Roman Catholic Archdiocese of New York's Cardinal Timothy M. Dolan for the "good works that he’s done on behalf of religious freedom, international peace and justice.”