In 1920 he settled in Philadelphia, where he became the first full-time Director of the Federation of Jewish Charities, known today as the Jewish Federation of Greater Philadelphia. He also held positions with many public and private welfare agencies, most notably as president of the National Conference of Jewish Social Service. He was also prominent in labor relations in Philadelphia, one year settling more than 80 major labor disputes. While in Philadelphia, he married Ruth Marshall, daughter of famed Jewish leader and lawyer, Louis Marshall.