Legislative Assistant to U.S. Senator Henry Bellmon, 1973-1974. Adjunct Professor of Law, University of Tulsa, 1979-1980. Chairman, Tax Section, Oklahoma Bar Association, 1981-1982. President, Tulsa Tax Professionals, 1983 and 1992. Commissioner, Arkansas-Oklahoma Arkansas River Compact Commission, 1990-1994. Member, National Association of Securities Dealers Board of Arbitrators, 1993-2001. Panel of Arbitration, American Arbitration Association, 1992-2001. District Court Commissioner, Ninth Judicial District of Teton County, Wyoming. Special Master appointment in complex litigation cases in Teton County, Wyoming.