| Lau Tung Ngiu William | 3041 | Civil | 1994-07-20 | DPC Consulting Engineers |
| Lau Tze Kiong | 5161 | Civil | 2018-10-18 | Yantron (Singapore) Pte. Ltd. |
| Lau Wei Hing | 3670 | Civil | 2001-10-16 | Emerald Asia Consulting Pte. Ltd. |
| Lau Yew Hoong | 3439 | Civil | 1998-10-23 | LYH Consultants |
| Lau Yew Wai | 4612 | Civil | 2014-06-23 | - |
| Lauw Angcai | 5188 | Civil | 2018-12-14 | LAC Consulting Engineers Pte. Ltd. |
| Lauw Su Wee | 2427 | Civil | 1988-11-25 | LSW Consulting Engineers Pte. Ltd. |
| Law Chee Keong | 4643 | Civil | 2014-10-21 | DP Engineers Pte. Ltd. |
| Law Ee Woon | 5317 | Civil | 2020-03-19 | Alps Consulting Engineers Pte. Ltd. |
| Law Guo Jian | 5731 | Electrical | 2025-02-27 | Siemens Pte. Ltd. |
| Law Kong Hoi | 3418 | Civil | 1998-07-21 | Surbana Jurong Consultants Pte. Ltd. |
| Lawrence Ling Hoe Ho | 5287 | Civil | 2019-12-05 | Seatrium (SG) Pte Ltd |
| Lawson Chung Jenn Haur | 5703 | Civil | 2024-09-26 | Taisei Corporation |
| Lay Kok Hin | 3785 | Civil | 2003-01-27 | PSA Corporation Ltd |
| Le Thanh Hai | 5785 | Civil | 2025-07-24 | YWL Engineering Pte Ltd |
| Lee Ah Mun | 5132 | Civil | 2018-08-16 | PSA Corporation Ltd |
| Lee Bee Wah | 3037 | Civil | 1994-07-20 | - |
| Lee Boon Sun | 5288 | Civil | 2019-12-05 | Defence Science and Technology Agency |
| Lee Boon Woei | 3747 | Mechanical | 2002-08-16 | National University Health System |
| Lee Cailin | 5726 | Civil | 2025-01-23 | Sembcorp Architects & Engineers Pte. Ltd. |
| Lee Chak Meng | 1376 | Mechanical | 1979-09-18 | WEC Engineers & Constructors Pte Ltd |
| Lee Chan Hsien | 5662 | Civil | 2024-06-27 | - |
| Lee Chang Yun | 5842 | Mechanical | 2026-02-26 | Surbana Jurong Consultants Pte Ltd |
| Lee Char Hwang | 4723 | Mechanical | 2015-10-14 | Pontiac Land Group |
| Lee Chee Jock | 4146 | Mechanical | 2007-02-23 | Defence Science and Technology Agency |
| Lee Chee Keong | 4528 | Electrical | 2013-08-23 | SP PowerGrid Limited |
| Lee Chee Wei | 4156 | Civil | 2007-02-23 | Land Transport Authority |
| Lee Chee Weye | 3642 | Civil | 2001-08-21 | Building and Construction Authority |
| Lee Chi Kuan | 2643 | Civil | 1991-03-20 | Longrove & Associates Pte. Ltd. |
| Lee Chi Ming | 2789 | Electrical | 1992-03-18 | Aegis Consulting Engineers |