Abe Vinik and Morris Levin have shared more than forty years of professional practice together as colleagues, collaborators and friends. Both studied social group work with Grace Coyle at Case-Western Reserve University in the 1940's and pursued their careers in neighborhood based agencies, retiring in the 1980's as executive directors with the United Jewish Community Centers in the San Francisco Metropolitan Area and the Jewish Community Centers of Chicago. Each has taught group process at the University of Chicago and other schools of social work in the U.S. They have held board leadership positions in NASW and other professional organizations and institutions, written extensively - with primary focus on group work theory, board and staff development, agency planning and administration, and served as consultants for the State Department in Europe and Israel. Since their retirement they have concentrated their consultation to local and national organizations in the areas of executive development, evaluation of agency structures and programs, and continuing education for professional staff.