| 1964 - 1969 |
Administrative Officer, Singapore Administrative Service |
| 1969 - Sep 1977 |
Neptune Orient Lines: Planning and Projects Manager Financial Director Managing Director (Nov 1973 - Sep 1977) |
| 1976 to date |
Member of Parliament (Marine Parade GRC) |
| 1977 - 1979 |
Senior Minister of State for Finance |
| 1979 - Nov 1990 |
Held various portfolios as Minister for Trade and Industry, Minister for Health and Minister for Defence |
| 1985 - Nov 1990 |
First Deputy Prime Minister and Minister for Defence |
28 Nov 1990 - 12 Aug 2004 |
Prime Minister (concurrently Minister for Defence until 1991.) Stepped down as Prime Minister on 12 Aug 2004 to pave the way for leadership self-renewal |
| 12 Aug 2004 to date |
Senior Minister in Prime Minister Lee Hsien Loong's Cabinet |
| 20 Aug 2004 to date |
Chairman, Monetary Authority of Singapore |