Distribution consultant Jos. Schlitz Brewing Company, Milwaukee, 1969-1971. President, owner Marling Industries, Lubbock, Texas, 1971-1974.
Private practice, Hurst, 1981-1988. Partner Caston and Marling, Texas, 1976-1981, 88—. Legal consultant St. John the Apostle School, Fort Worth, 1982-1991.
Member St. John the Apostle School Board, 1982-1984. Campaign manager Robert Caston for State Republican, Tarrant County, Texas, 1980, Rick Barton for Mayor, Bedford, Texas, 1992. Member American Bar Association, State Bar Texas (college since 1987), Tarrant County Bar Association, Northeast Tarrant County Bar Association (president 1990-1992), Soto Grande Tennis Club (Outstanding Member award 1980).