Bachelor of Science in Chemistry, University California, Berkeley, 1952. Diploma in chemical engineering, University Birmingham, England, 1954. Doctor of Philosophy in Chemical Engineering, University Birmingham, England, 1957.
Lecturer chemical engineering University Manchester, England, 1958-1960. With Shell Oil Corporation, Singapore and Malaysia, 1960-1970, director marketing, general manager, 1970-1973. With Shell International Petroleum Company, The Hague, The Netherlands, 1973-1974.
Chief executive Shell Companies, Malayasia, 1974-1977, chairman, chief executive Singapore, 1977-1982, chairman, 1982-1983. Managing director Monetary Authority Singapore, 1983-1984, Government of Singapore Investment Corporation Pte. Ltd., 1983-1984; elected member Parliament, 1984.
Minister trade and industry, 1985. Chairman Monetary Authority Singapoer also Board Commissioners Currency, Singapore, since 1985. Minister finance, since 1985.
Minister health, 1985-1987. Minister national development, 1992-1994.
Member Parliament, 1984.
Married Irene Tan Dee Leng. 2 children.