| Ting Tung Keat | 4278 | Electrical | 2008-01-17 | HHK-Delta Corporation Pte Ltd |
| Ting Ze Cheng | 5215 | Electrical | 2019-04-18 | SG Wireman Pte Ltd |
| Tiong Hoo Tuong | 2986 | Civil | 1994-01-19 | City-Tech Associates |
| Tiong Yong Tung | 1587 | Mechanical | 1981-03-24 | TYT Consultants |
| Tiruselvan | 5510 | Electrical | 2023-01-26 | RNC Engineering Pte Ltd |
| Tjhan Lie Fang | 5437 | Civil | 2022-01-27 | T.Y.Lin International Pte. Ltd. |
| Tng Li Hui | 5816 | Mechanical | 2025-11-27 | Singapore District Cooling Pte. Ltd. |
| Toh Ann Nah Bernadette | 4691 | Civil | 2015-06-18 | Rankine & Hill (Singapore) Pte. Ltd. |
| Toh Chee Kiong | 5089 | Civil | 2018-06-21 | BG&E Consulting Engineers Pte. Ltd. |
| Toh Chin Keong | 5293 | Civil | 2019-12-05 | CAGA Consultants Pte. Ltd. |
| Toh Eng Guan | 2617 | Electrical | 1991-01-16 | SP PowerGrid Limited |
| Toh Freddy | 5170 | Mechanical | 2018-10-18 | Cundall Singapore Pte. Ltd. |
| Toh Guen Keng | 5217 | Electrical | 2019-04-18 | Sembcorp Architects & Engineers Pte. Ltd. |
| Toh Han Lin | 4309 | Civil | 2009-04-16 | Ease Engineering Consultancy Pte. Ltd. |
| Toh Hao Chieh | 5094 | Mechanical | 2018-06-21 | Ministry of Manpower |
| Toh Hiap Soon Amos | 4223 | Mechanical | 2007-05-17 | City Energy Pte. Ltd. (as Trustee of City Energy Trust) |
| Toh Joo Chai | 3410 | Electrical | 1998-06-23 | TJC Projects |
| Toh Kelvin | 4473 | Civil | 2012-09-20 | Brown Consulting Pte. Ltd. |
| Toh Quanli | 4850 | Mechanical | 2017-02-16 | Microsoft Operations Pte Ltd |
| Toh Siaw Hui | 3870 | Electrical | 2004-03-16 | MOH Holdings Pte Ltd |
| Toh Wei Liang | 5532 | Civil | 2023-04-27 | Land Transport Authority |
| Toh Wei Liang | 4913 | Electrical | 2017-08-22 | SP PowerGrid Limited |
| Toh Yili Emily | 4950 | Electrical | 2017-10-23 | Changi Airport Group (Singapore) Pte. Ltd. |
| Toi Boon Bin @ Chen Boon Bin | 1970 | Electrical | 1983-08-30 | Meinhardt (Singapore) Pte Ltd |
| Tong Chi Wai | 3533 | Mechanical | 2000-03-21 | WSP Consultancy Pte. Ltd. |
| Tong Han Seng | 5485 | Civil | 2022-09-29 | Arup Singapore Private Limited |
| Tong Kok Kwang | 3312 | Mechanical | 1997-05-20 | - |
| Tong Swei Yeh | 4124 | Civil | 2007-02-23 | Aurecon Singapore (Pte.) Ltd. |
| Tong Ween Kai | 4007 | Electrical | 2005-09-20 | GMEP-K Consultants LLP |
| Tong Yew Meng | 3175 | Mechanical | 1995-09-20 | YM & Associates |