In the early 1990s Sussman worked with the Community Hunger Outreach Warehouse (CHOW) to collect and distribute food in Binghamton NY. CHOW worked with a number of religious organizations to fight hunger in the community. One site of distribution was Temple Concord where Sussman was the rabbi. In 2002, shortly after he arrived in the Philadelphia area, he was the founding president of the Cheltenham Area Multifaith Council (CAMC). Participants included Christians, Muslims, Buddhists, and Jews. After the attack on the World Trade Center (9-11) in 2001 he worked with the Foundation for Ethnic Understanding to promote Jewish-Muslim dialog. With the FFEU he participated in programming at the United States House of Representatives and at the United Nations on promoting Muslim-Jewish understanding. Sussman's picture appeared in an FFUE's full page ad in the New York Times. (April 13, 2008) . In the Philadelphia area he worked with the Peace Islands initiative to foster Muslim-Jewish dialog. (Fetullah Gulen) Gulen Movement. He has also worked with the Thanks-Giving Square Foundation, a Dallas, Texas-based UN NGO that promotes global interfaith understanding through the practice of giving thanks. On March 1, 2001 Sussman gave the opening prayer for a session of the United States House of Representatives. In the wake of the earthquake in Haiti in 2010, Sussman helped run a fund raising effort at KI in cooperation with local Haitian organizations.