- Manager, Hamilton Management, Inc., Austin, Texas, 1962-1968;scientist, Owens Illinois, Toledo, 1968-1973;risk manager, Owens Illinois, Toledo, 1974-1976;staff attorney, Owens Illinois, Toledo, 1977-1980;manager legislation affairs, Owens Illinois, Toledo, 1981-1984;president, Hansa World Cargo Svc., Inc., Oakland, California, 1984-1986;in-house counsel, Brown Vence & Associations, San Francisco, 1987-1988;general counsel, Pacific Management Company, Sacramento, 1986-1988;president, John P. Cummings & Association, Fremont, California, since 1988. Consultant Glass Packaging Institute, Washington, 1970-1983, Environmental Protection Agency, Washington, 1970-1974.
With United States Air Force, 1955-1962, 68-69, 75-76, 84-85, colonel retired 1986. Fellow Royal Chemical Society. Member American Bar Association, Veterans of Foreign Wars, American Society for Testing and Materials (chairman 1979), American Ceramic Society (chapter chairman 1973), American Industrial Hygiene Association, American Chemical Society, Reserve Officers Association (legislation chairman 1979-1985), American Legion, Knights of Columbus (4th degree), Amvets.