Deacon, International Evangelical Church, Ethiopia, 1979-1982. Treasurer, Oversea Chinese Mission, New York, 1963-1972.
Chief, Budget & Finance Section, Economic and Social Commission for Asia and the Pacific since 1982. Chief, Budget & Finance Section, Economic Commission for Africa, Addis Ababa, Ethiopia, 1978-1982. Finance Officer, Economic and Social Commission for Asia and the Pacific, Bangkok, 1973-1978.
Chief Finance Officer, United Nations Mission, Dacca, Bangladesh, 1972-1973. Accountant, Accounts Division, Department of Administration and Management, United Nations, New York, 1964-1972.