| Ma Wei | 5235 | Civil | 2019-07-18 | Bloxam Burnett & Olliver Ltd |
| Madan Bikram Khadka | 4768 | Civil | 2016-04-12 | KK Lim & Associates Pte. Ltd. |
| Madhavan George | 3241 | Civil | 1996-06-14 | PUB, Singapore's National Water Agency |
| Mah Hong Leong | 1387 | Electrical | 1979-12-08 | Kenma Consultants & Engineering Services |
| Mah Seong Wee | 4097 | Civil | 2006-11-21 | PAL Consultancy Pte. Ltd. |
| Mah Siak Kiong | 3636 | Civil | 2001-07-17 | Surbana Jurong Infrastructure Pte. Ltd. |
| Mahony Kerry Keith | 4191 | Civil | 2007-04-19 | Marina Technology and Construction Private Limited |
| Mak Chee Wai Michael | 4105 | Electrical | 2007-01-26 | GSM Pte. Ltd. |
| Mak Choy Weng | 5271 | Electrical | 2019-10-17 | SP Group |
| Mak Peng Nam | 3063 | Civil | 1994-09-21 | MNA & Partners |
| Mak Swee Chiang | 4321 | Civil | 2009-08-20 | Arup Singapore Private Limited |
| Mak Wai Choong | 3709 | Civil | 2002-05-08 | - |
| Mak Wan Yuen | 2332 | Electrical | 1987-11-17 | YL Integrated Pte. Ltd. |
| Mak Yew Cheong | 2474 | Civil | 1989-05-17 | CPG Consultants Pte Ltd |
| Manchikanti Venkata Sukesh | 5410 | Civil | 2021-05-27 | Sato Kogyo (S) Pte Ltd |
| Manivel S/O Rudrapathi | 4021 | Mechanical | 2006-03-21 | R@dians Consultancy Services |
| Marc Gourde | 3862 | Civil | 2003-11-18 | Aurecon Singapore (Pte.) Ltd. |
| Marcus Ng Chi Wai | 5602 | Civil | 2023-11-23 | Ramboll Pte. Ltd. |
| Marcus Tan | 2593 | Mechanical | 1990-08-15 | Eletrain Pte. Ltd. |
| Maria Pradeep Vicran | 5599 | Civil | 2023-11-23 | CKMbT International Pte. Ltd. |
| Mark Chan Kok Hou | 4548 | Electrical | 2013-10-17 | CPG Consultants Pte Ltd |
| Mark Javen Ng Thong Zi | 5872 | Electrical | 2026-04-23 | Singapore One Rail Pte Ltd |
| Mark Teo Peng Yu | 4493 | Electrical | 2012-10-16 | SP PowerGrid Limited |
| Marwin | 5492 | Mechanical | 2022-11-24 | PUB, Singapore's National Water Agency |
| Maung Tin Tun | 4827 | Mechanical | 2016-10-18 | - |
| Max Ernst Meyer | 2619 | Civil | 1991-02-20 | Rui-Feng International Pte Ltd |
| Md Rafiqul Islam | 4600 | Civil | 2014-05-15 | TW-Asia Consultants Pte. Ltd. |
| Meiyappan Siva Pandian | 5144 | Electrical | 2018-09-20 | SP Group |
| Miao Lingyu | 5656 | Civil | 2024-06-27 | Arup Singapore Private Limited |
| Michael John McGowan | 4489 | Civil | 2012-10-16 | Arup Singapore Private Limited |