| Liu Mi | 5228 | Civil | 2019-06-20 | Arup Singapore Private Limited |
| Liu Qiaoxia | 5719 | Civil | 2024-10-24 | Housing & Development Board |
| Liu Renhao | 5582 | Mechanical | 2023-09-28 | Arup Singapore Private Limited |
| Liu Shao Yong | 4477 | Civil | 2012-10-16 | KTP Consultants Pte Ltd |
| Liu Wang Lai | 2316 | Electrical | 1987-05-20 | DSCO Group Holding Pte Ltd |
| Liu Xianming | 4296 | Civil | 2009-02-19 | ERSS Consultants Pte. Ltd. |
| Liu Xiaofeng | 5256 | Mechanical | 2019-09-19 | Gims & Associates Pte. Ltd. |
| Liu Xiaopeng | 4750 | Civil | 2016-02-16 | Leo Building Solutions |
| Liu Xiayu | 4746 | Civil | 2016-01-14 | Redot Engineers Pte. Ltd. |
| Liu Xuedong | 5859 | Electrical | 2026-02-26 | DRPL Corporation Pte Ltd |
| Liu Yongjun | 5184 | Electrical | 2018-12-14 | PIE Pte. Ltd. |
| Liu Yujun | 4842 | Civil | 2017-01-19 | Emerald Asia Consulting Pte. Ltd. |
| Liu Yunpeng | 5922 | Civil | 2026-06-25 | Gamuda Berhad Singapore Branch |
| Liw Tat Man Bertrand Dany Ives Fook Cheong | 4375 | Civil | 2010-11-18 | LTM Consultants |
| Lo Ai Jin | 5525 | Mechanical | 2023-03-23 | Building and Construction Authority |
| Lo Kem Wah | 5181 | Electrical | 2018-10-18 | SP PowerGrid Limited |
| Lock Kai Sang | 2202 | Electrical | 1985-09-30 | Singapore Institute Of Technology |
| Loh Albert | 1506 | | 1980-10-18 | Albert Loh Consultants Pte. Ltd. |
| Loh Bak Lee | 4629 | Electrical | 2014-09-18 | CH2M Hill Singapore Private Limited |
| Loh Chang Kaan | 3983 | Civil | 2005-06-21 | Tritech Consultants Pte. Ltd. |
| Loh Chee Keong | 5141 | Civil | 2018-09-20 | E2000 Pte. Ltd. |
| Loh Chee Shyong | 4406 | Electrical | 2011-09-23 | Digital Edge (Singapore) Pte. Ltd. |
| Loh Chee Siang | 5004 | Electrical | 2018-01-08 | LC Engineering Services Pte. Ltd. |
| Loh Chew Thong | 2263 | Mechanical | 1986-08-21 | THG & Associates |
| Loh Chin Poh | 2686 | Civil | 1991-06-19 | System Foundation Pte Ltd |
| Loh Chung Hua | 3808 | Electrical | 2003-05-20 | SOE Engineering Pte Ltd |
| Loh Fook Yuen | 3487 | Electrical | 1999-07-20 | Alpha Consulting Engineers Pte Ltd |
| Loh Hsin Wen | 4752 | Civil | 2016-02-16 | E2000 Pte. Ltd. |
| Loh Khiuk Ling | 4028 | Civil | 2006-04-18 | GLT Engineers Pte. |
| Loh Kian Ann | 2275 | Civil | 1986-08-21 | Kian Loh & Associate |