| Tan Kay Hoon | 1164 | Electrical | 1976-03-25 | Tan Consultants |
| Tan Kee Chong | 4269 | Mechanical | 2007-07-19 | Building and Construction Authority |
| Tan Kee Choon | 3368 | Electrical | 1997-10-21 | PDsen Pte Ltd |
| Tan Keh Mui | 3708 | Civil | 2002-05-08 | PH Consulting Pte. Ltd. |
| Tan Keng Long, Paul | 4797 | Electrical | 2016-08-18 | Pact Power Services |
| Tan Keng Siong | 1745 | Electrical | 1982-03-05 | TYE Engineering |
| Tan Keng Swee | 3866 | Electrical | 2004-01-06 | Building and Construction Authority |
| Tan Keok Siew | 3059 | Civil | 1994-09-21 | Beca Carter Hollings & Ferner (S.E.Asia) Pte Ltd |
| Tan Khe Sin Alan | 1749 | Electrical | 1982-04-30 | Tan Consultants |
| Tan Kheng Kee | 4350 | Electrical | 2010-05-20 | Keppel (Infrastructure Division) |
| Tan Kheng Soon | 3639 | Civil | 2001-07-17 | Ease Engineering Consultancy Pte. Ltd. |
| Tan Kian Hock, James | 4867 | Chemical | 2017-03-23 | Novexx Pte. Ltd. |
| Tan Kian Thong | 3288 | Civil | 1996-10-02 | Land Transport Authority |
| Tan Kiang Hwee | 2642 | Civil | 1991-03-20 | National University Of Singapore |
| Tan Kiat Leong | 4241 | Mechanical | 2007-06-14 | - |
| Tan Kim Fatt | 5758 | Civil | 2025-04-17 | RSP Architects Planners & Engineers (Pte) Ltd |
| Tan Kim Leong | 4001 | Civil | 2005-09-20 | Building and Construction Authority |
| Tan Kim Tah | 4753 | Civil | 2016-02-16 | TKT Engineers |
| Tan Kok Ann | 4509 | Electrical | 2013-04-18 | Amega Precess Management Pte Ltd |
| Tan Kok Chen | 4343 | Civil | 2010-02-18 | R.J. Crocker Consultants Pte Ltd |
| Tan Kok Koon | 2874 | Electrical | 1992-10-21 | - |
| Tan Kok Yong | 4426 | Civil | 2012-02-16 | Changi Airport Group (Singapore) Pte. Ltd. |
| Tan Kwan Joo | 3859 | Civil | 2003-11-18 | Building and Construction Authority |
| Tan Kwang Hung | 3822 | Electrical | 2003-06-24 | Land Transport Authority |
| Tan Kwee Meng Nick | 3780 | Mechanical | 2003-01-27 | National Environment Agency |
| Tan Lay Hua | 5663 | Electrical | 2024-06-27 | SP Group |
| Tan Lee Ann Andrew | 2832 | Electrical | 1992-06-15 | Singapore Institute of Power and Gas Pte. Ltd. |
| Tan Lee Chia James | 3307 | Electrical | 1997-03-18 | Alsys Pte. Ltd. |
| Tan Lee Chua | 2542 | Mechanical | 1990-03-21 | - |
| Tan Lee Geok | 5465 | Civil | 2022-06-23 | Mott MacDonald Singapore Pte Limited |