Deputy Director, Energy Division, Economic Commission for Europe since 1991. Chief, Gas Section, Energy Division, Economic Commission for Europe, Geneva, 1986-1991. Team Leader, United States Department of Energy, 1981-1986.
Chief, Natural Gas Division, Federal Energy Administration, Washington, District of Columbia, 1974-1978. Industrial Special, Office(s) of Oil & Gas, United States Department of the Interior, 1970-1974. Regulatory Gas Utility Special, Federal Power Commission, Washington, District of Columbia, 1957-1970.