Society of Naval Architects & Marine Engineering of New York. Royal Institute of Naval Architecture of London. Society of Naval Architecture & Marine Engineering of Tokyo.
Chief, Special Technology Promotion Unit, IPCT/TP, United Nations Industrial Development Organization since 1977. Director General, National Technology Transfer Center, Korea, 1972-1977. Director, Tech Information Division, Korea Institute of Science(s) and Technology, 1972-1977.
Professor, Engineering College, Memorial University of Newfoundland, Canada, 1971-1972. Partner & Director, Marine Engineering Consulting Company, Canada, 1959-1967.