 Lewin also led a seminar in Supreme Court litigation at Columbia Law School.Between 1982 and 1984, he served as President of the Jewish Community Council of Greater Washington, and for more than 30 years, he served as the national vice president of the National Jewish Commission on Law and Public Affairs (COLPA).Lewin was president of the American Section of the International Association of Jewish Lawyers and Jurists from 1992 to 1997.