| Tan Choo Kee | 2223 | Electrical | 1986-02-03 | T & F Engineering Consultants |
| Tan Choon Aeiong Allen | 4248 | Civil | 2007-07-19 | PSA Corporation Limited |
| Tan Choon Huat | 4576 | Electrical | 2014-01-16 | PSA Corporation Limited |
| Tan Choon Kong | 3127 | Civil | 1995-05-17 | SIPM Consultants pte ltd |
| Tan Choon Puay | 5013 | Chemical | 2018-01-08 | - |
| Tan Choon Theng | 5138 | Civil | 2018-09-20 | Engineers Alliance Pte. Ltd. |
| Tan Chuan Boon | 4698 | Civil | 2015-07-16 | CPG Consultants Pte Ltd |
| Tan Chuan Ping | 3270 | Civil | 1996-08-07 | TCP Consultants Pte. Ltd. |
| Tan Chun Siang | 5775 | Electrical | 2025-06-19 | Defence Science and Technology Agency |
| Tan Chun Yang | 5393 | Electrical | 2021-02-25 | Defence Science and Technology Agency |
| Tan Chun Yong | 4083 | Civil | 2006-10-17 | Building and Construction Authority |
| Tan Chun Yuan | 5905 | Mechanical | 2026-05-28 | Defence Science And Technology Agency (DSTA) |
| Tan Chwee Kee | 2930 | Civil | 1993-05-19 | - |
| Tan Ee Ching | 4023 | Mechanical | 2006-03-21 | Hazard Control Engineering Pte. Ltd. |
| Tan Eng Chee | 4851 | Mechanical | 2017-02-16 | 3T Ecoplus Pte. Ltd. |
| Tan Eng Hong | 4697 | Civil | 2015-07-16 | Meinhardt (Singapore) Pte Ltd |
| Tan Eng How | 1606 | Civil | 1981-03-24 | Accord Consultants Pte. Limted |
| Tan Eng Seng | 4380 | Mechanical | 2011-01-19 | Mecro Engineering Services |
| Tan Fie Chen | 5111 | Civil | 2018-07-19 | KTP Consultants Pte Ltd |
| Tan Gak Peng | 3130 | Civil | 1995-05-17 | Cundall Singapore Pte. Ltd. |
| Tan Gek Buay Margaret | 3588 | Civil | 2000-10-17 | Home Team Science and Technology Agency |
| Tan Geok Eu | 4294 | Electrical | 2009-02-19 | TGE Consulting Engineers |
| Tan Geok Lee | 4169 | Civil | 2007-03-15 | Building and Construction Authority |
| Tan Geok Leng | 3908 | Mechanical | 2004-07-26 | Total Professional Services |
| Tan Guan Beng | 3449 | Civil | 1998-12-17 | KTP International Pte. Ltd. |
| Tan Hak Khoon | 2803 | Electrical | 1992-05-20 | - |
| Tan Hang Kiang | 5397 | Electrical | 2021-03-25 | Defence Science and Technology Agency |
| Tan Hang Kwang | 2208 | Mechanical | 1985-11-07 | Hang Kwang & Associates |
| Tan Heng Lee | 1709 | Mechanical | 1981-12-23 | Gims & Associates Pte. Ltd. |
| Tan Heng Wee | 1586 | Mechanical | 1981-03-24 | - |