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| Loh Lee Hiang | 2815 | Civil | 1992-05-20 | Consultant United Pte. Ltd. |
| Loh Leong Fui Andrew | 4458 | Electrical | 2012-07-17 | Defence Science and Technology Agency |
| Loh Siew Khoon | 1803 | Civil | 1982-08-17 | CMC Construction Pte. Ltd. |
| Loh Teck Liang Darrick | 3793 | Electrical | 2003-02-27 | Sembcorp Architects & Engineers Pte. Ltd. |
| Loh Wah Kay | 1741 | Electrical | 1982-03-05 | M & P Consulting Engineers |
| Loh Wei Tong | 4048 | Electrical | 2006-05-16 | WT Consultants |
| Loh Wenchuan | 4784 | Civil | 2016-06-16 | Zhuang Consulting Engineers |
| Loh Wye Chieng | 4744 | Electrical | 2016-01-14 | JLES Services Pte. Ltd. |
| Loh Yew Fatt | 4077 | Electrical | 2006-09-19 | HDR Consulting Pte. Ltd. |
| Loh Yi-Shin | 3897 | Civil | 2004-06-22 | MOH Holdings Pte Ltd |
| Loh Yin Leng | 3107 | Civil | 1995-03-15 | Lim Kim Cheong Consultants |
| Loh Yong Yeow | 3575 | Civil | 2000-08-15 | WSP Consultancy Pte. Ltd. |
| Loi Chin Heng | 2694 | Electrical | 1991-07-17 | PTP Engineers Pte. Ltd. |
| Loi Kheng Seong | 4923 | Chemical | 2017-08-22 | Tenwit Consultants Pte. Ltd. |
| Lok Boon Bing | 4715 | Electrical | 2015-09-21 | Richard Lok M & E Consultants |
| Lok Choon Cheow | 1344 | Electrical | 1978-05-16 | Richard Lok M & E Consultants |
| Lok Chuan Seng @ Lok Fatt Kan | 3719 | Civil | 2002-06-21 | Lim Kim Cheong Consultants |
| Lok Hon Keong | 3216 | Civil | 1996-04-03 | Housing & Development Board |
| Lok Nam Moon | 2465 | Civil | 1989-03-22 | Yat Yuen Hong Company Limited |
| Lok Tat Seng | 3164 | Civil | 1995-08-16 | PHM Technologies Pte. Ltd. |
| Lok Wai Loon | 4916 | Civil | 2017-08-22 | Surbana Jurong Consultants Pte. Ltd. |
| Loke Git Yan | 2861 | Mechanical | 1992-09-16 | MEP Projects Consultants |
| Loke Hong Poh Larry | 1644 | Mechanical | 1981-05-11 | Abundant Engineering Pte. Ltd. |
| Loke Kok Kei | 1817 | Mechanical | 1982-08-17 | KK Loke Engineering Services |
| Loke Sim Wee Joshua | 4655 | Mechanical | 2014-10-21 | JL Engineering and Consultancy Services Pte. Ltd. |
| Loke Yee Weng | 2523 | Mechanical | 1990-01-23 | BMS Engineers Pte Ltd |
| Long Sa Kow | 2963 | Civil | 1993-10-20 | Surbana Jurong Consultants Pte. Ltd. |
| Long Wenjiu | 4583 | Civil | 2014-02-20 | CHECC(Singapore) Pte. Ltd. |
| Loo Boon Kang | 1381 | Electrical | 1979-12-08 | PowerTech Consultants |