Director, Office(s) in North America, United Nations University, United Nations since 1989. Executive Officer, Office of the Rector, United Nations University, Tokyo, 1980-1988. Senior Governmental & Institutional Relations Officer, United Nations University, Tokyo, 1976-1980.
General Secretary, World University Service, Geneva, 1968-1975. Chairman, Special Committee(s) on the Second Development Decade, Geneva, 1970-1974. Association Secretary-General, 1967, Association Secretary, 1961-1966, World University Service, Geneva, 1961-1966.
Executive Secretary, Indian National Committee(s), World University Service, Madras, India, 1958-1960. Assistant Professor of Physics, University of Madras, 1955-1958.