| Tan Geok Leng | 3908 | Pressure Vessel Engineering | 2017-04-20 | Total Professional Services |
| Tan Geok Leng | 3908 | Crane Engineering | 2017-04-20 | Total Professional Services |
| Tan Geok Leng | 3908 | Lift and Escalator Engineering | 2017-04-20 | Total Professional Services |
| Tan Geok Leng | 3908 | Access Platform Engineering | 2017-04-20 | Total Professional Services |
| Tan Hua Oo | 2883 | Access Platform Engineering | 2017-03-23 | Mechelect Engineering Services |
| Tan Hua Oo | 2883 | Lift and Escalator Engineering | 2017-03-23 | Mechelect Engineering Services |
| Tan Jian Zhi | 5379 | Lift and Escalator Engineering | 2021-01-21 | Building And Construction Authority (BCA) |
| Tan Kang Hai | 3199 | Protective Security Engineering | 1996-02-14 | Nanyang Technological University (NTU) |
| Tan Kee Chong | 4269 | Lift and Escalator Engineering | 2018-01-08 | Building and Construction Authority |
| Tan Kee Chong | 4269 | Crane Engineering | 2018-01-08 | Building and Construction Authority |
| Tan Kee Chong | 4269 | Pressure Vessel Engineering | 2018-01-08 | Building and Construction Authority |
| Tan Kee Chong | 4269 | Access Platform Engineering | 2018-01-08 | Building and Construction Authority |
| Tan Nge Liang Philip | 0590 | Pressure Vessel Engineering | 2017-04-20 | Hazard Control Engineering Pte. Ltd. |
| Tan Nge Liang Philip | 0590 | Lift and Escalator Engineering | 2017-04-20 | Hazard Control Engineering Pte. Ltd. |
| Tan Nge Liang Philip | 0590 | Access Platform Engineering | 2017-04-20 | Hazard Control Engineering Pte. Ltd. |
| Tan Nge Liang Philip | 0590 | Crane Engineering | 2017-04-20 | Hazard Control Engineering Pte. Ltd. |
| Tan Siew Ann | 3004 | Geotechnical Engineering | 2006-05-16 | - |
| Tan Swee Hong | 5294 | Protective Security Engineering | 2024-01-25 | Home Team Science and Technology Agency |
| Tan Thiam Soon | 3118 | Geotechnical Engineering | 2007-04-19 | Singapore Institute of Technology |
| Tan Tuang Ho | 4755 | Geotechnical Engineering | 2024-01-25 | Building and Construction Authority |
| Tan Zhi Yong Charles | 4852 | Access Platform Engineering | 2021-01-21 | Tribute Inspection and Engineering |
| Tan Zhi Yong Charles | 4852 | Pressure Vessel Engineering | 2020-09-17 | Tribute Inspection and Engineering |
| Tan Zhi Yong Charles | 4852 | Crane Engineering | 2020-09-17 | Tribute Inspection and Engineering |
| Tang Tai Ting | 4652 | Geotechnical Engineering | 2019-03-21 | Thymn Pte. Ltd. |
| Tang Weng Cheong | 4014 | Lift and Escalator Engineering | 2022-08-25 | Atroy Services |
| Tay Cheow Khoon | 2086 | Lift and Escalator Engineering | 2017-03-23 | Allplus Industrial Services Pte Ltd |
| Tay Cheow Khoon | 2086 | Access Platform Engineering | 2017-03-23 | Allplus Industrial Services Pte Ltd |
| Tay Cheow Khoon | 2086 | Pressure Vessel Engineering | 2017-03-23 | Allplus Industrial Services Pte Ltd |
| Tay Cheow Khoon | 2086 | Crane Engineering | 2017-03-23 | Allplus Industrial Services Pte Ltd |
| Tay Cher Seng | 2777 | Lift and Escalator Engineering | 1992-03-18 | ME(TCS) consulting engineers |