| Tan Lee Hwa | 2908 | Civil | 1993-03-17 | MNA & Partners |
| Tan Lee Hwang | 3340 | Civil | 1997-08-19 | Sterling Engineers Pte. Ltd. |
| Tan Lek Lek | 3328 | Mechanical | 1997-05-20 | Dialog Plant Services Pte Ltd. |
| Tan Meng Heng Robin | 3005 | Electrical | 1994-03-16 | - |
| Tan Ming Han | 5857 | Electrical | 2026-02-26 | ON Engineers Pte Ltd |
| Tan Ming Wooi | 3564 | Civil | 2000-07-18 | Vland Consultants Pte. Ltd. |
| Tan Nge Liang Philip | 0590 | Mechanical | 1973-01-24 | Hazard Control Engineering Pte. Ltd. |
| Tan Ngo Chiaw | 3440 | Civil | 1998-10-23 | CH2M Hill Singapore Consulting Pte. Ltd. |
| Tan Peck Khoon | 2034 | Mechanical | 1984-02-28 | Rankine & Hill (Singapore) Pte. Ltd. |
| Tan Peng Chuan | 4889 | Mechanical | 2017-06-15 | Energy Market Authority |
| Tan Peng Chuan | 2971 | Civil | 1993-10-20 | A Y Consultants |
| Tan Peng Chuan Rayner | 5791 | Mechanical | 2025-07-24 | Building and Construction Authority |
| Tan Pian Boon | 5207 | Civil | 2019-03-21 | Gamuda Berhad Singapore Branch |
| Tan Pua Yong | 1463 | Electrical | 1980-08-19 | Amega Precess Management Pte. Ltd. |
| Tan Pui Lai | 5420 | Civil | 2021-08-26 | Land Transport Authority |
| Tan Qianping Jasmine | 5744 | Mechanical | 2025-03-27 | Alpha Consulting Engineers Pte Ltd |
| Tan Ru Chen | 3051 | Electrical | 1994-08-17 | SP PowerGrid Ltd |
| Tan Seato | 2877 | Civil | 1992-10-21 | S Tan Consultants |
| Tan See Chee | 2990 | Civil | 1994-02-16 | SC Consulting |
| Tan Seng Chuan | 3018 | Civil | 1994-05-18 | Tembusu Asia Consulting Pte. Ltd. |
| Tan Sew Guan | 4677 | Civil | 2015-04-16 | RSP Architects Planners & Engineers (Pte) Ltd |
| Tan Shon Lei | 5586 | Mechanical | 2023-09-28 | Energy Market Authority |
| Tan Shu Min Emily | 3923 | Civil | 2004-09-21 | TSM Consultancy Pte. Ltd. |
| Tan Si Ling Delphine | 5015 | Chemical | 2018-01-08 | Shell Singapore Pte. Ltd. |
| Tan Si Yun Magdalene | 5738 | Mechanical | 2025-02-27 | Building and Construction Authority |
| Tan Siam Hang | 1949 | Mechanical | 1983-07-27 | Kim Hwee Industrial Technology Pte Ltd |
| Tan Siew Ann | 3004 | Civil | 1994-03-16 | - |
| Tan Sje Ting | 5488 | Civil | 2022-09-29 | Arup Singapore Private Limited |
| Tan Su Chern | 5628 | Civil | 2024-03-28 | JTC Corporation |
| Tan Suan Sim Allen | 4673 | Civil | 2015-04-16 | Jacobs International Consultants Pte. Ltd. |