Rabbi Schneier has led 68 interfaith missions in China, Russia, Eastern Europe and Latin America. In 1992, he convened the Religious Summit on the Former Yugoslavia in Switzerland, and in 1995, he convened the Conflict Resolution Conference in Vienna to mobilize world religious leaders to stop the conflict in the Balkans. For more than 20 years, Rabbi Schneier worked closely with Grand Mufti Ceric of Bosnia and Herzegovina. In 1992, they gathered together some of the top religious leaders from former Yugoslavia in Bern, Switzerland, including Cardinal Vinko Puljic, Archbishop of Sarajevo, formally of Zagreb, Patriarch Pavle of the Serbian Orthodox Church and Grand Mufti Jakub efendi Selimoski of Sarajevo to call for an end to the conflict. What emerged was Erklärung von Bern in which they declared that "a crime in the name of religion is the greatest crime against religion." These efforts helped to forge a pathway to the Dayton Accord. In 2012, Rabbi Schneier helped commemorate the Srebrenica massacre that occurred during the breakup of Yugoslavia by delivering the keynote address at the 17th annual Srebrenica memorial. He is thus far the only non-Muslim to do so. During his address, Rabbi Schneier delivered a message from U.S. president Barack Obama.