Head research and utilizatidn division Government East Pakistan, 1949-1957. Science advisor to high commissioner for Pakistan, London, 1957-1965. Director regional office science and technical for Arab States, United Nations Educational, Cairo, 1970-1977, head science operational programs for Asia and Oceania, Paris, 1978-1981, representative from Bangladesh to executive board United Nations Educational, since 1981.
Chairman British Commonwealth Science Offices, London, 1958. Governor Imperial College of Science and Technology, London, 1958-1965. Vice chairman Commonwealth Agricultural Bureau Review Conference, London, 1960.
Chairman Commonwealth Agricultural Bureau, Farnham Common, United Kingdom, 1961. Alternate board governors International Atomic Energy Commission, Vienna, Austria, 1963. Observer parliamentary and science committee Parliament, London, 1961-1965.
Assessor British Pest Infestation Research Board, London, 1959, British Committee International Nature Conservation, London, 1958-1965. Deputy secretary general Conference Application of Science and Technology to Development of Arab States, Rabat, Morocco, 1976, Conference Application of Science and Technology to Development of Africa, Dakar, Senegal, 1978.