Private practice law, Denver, 1974—1977. Trust officer United Bank Denver, 1977—1979. Tax consultant Atlantic Richfield, Dallas, 1979—1980.
Professor University Texas, Arlington, since 1980. Director Quantum Resources Corporation, Denver, 1979—1982.
Member of American Bar Association (natural resources committee member 1988), Indiana Producers Association America (member tax committee, editor Journal Petroleum Accounting), American Institute of Certified Public Accountants (education committee member 1982-1984), Colorado Bar Association, Texas Bar Association, Council Petroleum Accountants (chairman education committee Fort Worth 1984), Tau Beta Pi, Omicron Delta Kappa.