Member technical staff Bell Telephone Laboratories, Whippany, New Jersey, 1968-1971. Cost engineer Exxon Resource and Engineer Company, Florham Park, 1971-1972. Deputy attorney general State of New Jersey, Trenton, 1974-1976.
Associate Rosenman and Colin, New York City, 1976-1981. Private practice Brooklyn, 1981—2001. Associate Bivona & Cohen, New York City, 2001—2003.
Member New York State Sum/Um Arbitrators, 1995-2001.