| 民間 | Swiss Bank Corporation | 1989 | 入行 | | |
| Temasek Holdings (Private) Limited | 2000 | Managing Director | | |
| Jardine Cycle & Carriage Limited | 2011 | Independent Director | | |
| Kohlberg Kravis Roberts & Co. L.P. | 2011 | Senior Advisor | | |
| United Overseas Bank Limited | 2014 | Independent Director | | |
| 日本ペイント | 2022 | 社外取締役 | ○ | |
| Japfa Ltd. | 2023 | Non-Executive Independent Chairman | | |
| JERA | 2023 | 独立社外取締役 | ○ | |
| 官公庁 | Parliament of Singapore | 1996 | — | | |
| 2002 | Deputy Speaker | |
| 2002 | Public Accounts Committee, Chairman | |
| 2004 | Minister of State for Finance | |
| 2004 | Minister of State for Transport | |
| 2008 | Senior Minister of State for Finance | |
| 2008 | Senior Minister of State for Transport | |
| 2009 | Minister in the Prime Minister's Office | |
| 2009 | Second Minister for Finance | |
| 2009 | Second Minister for Transport | |