| Michael Lim Swee Leng | 4348 | Mechanical | 2010-03-18 | Surbana Jurong Consultants Pte. Ltd. |
| Michael Schmaus | 5530 | Civil | 2023-04-27 | Cembra Consultancy Pte. Ltd. |
| Michael Sien Hay Wah | 4569 | Civil | 2013-10-17 | WSP Consultancy Pte Ltd |
| Michael Tan Pau Fatt | 5827 | Civil | 2026-01-22 | Arup Singapore Pte. Ltd. |
| Michelle Tai Pei Wen | 5786 | Civil | 2025-07-24 | Thymn Pte. Ltd. |
| Moe Kyaw Aung | 4538 | Civil | 2013-10-17 | Landmark Consultant Pte. Ltd. |
| Moey Weng Seng | 4669 | Civil | 2015-03-19 | Surbana Jurong Consultants Pte. Ltd. |
| Moh Wung Hee | 1942 | Civil | 1983-07-27 | - |
| Mohamad Ayub Hassan | 2722 | Civil | 1991-10-15 | Maha Consultants |
| Mohamad Hazahar Bin Mohd Nuron | 5416 | Electrical | 2021-07-21 | Wah Loon Plant & Instrumentation Pte. Ltd. |
| Mohamad Nasser B Mustapha | 2033 | Mechanical | 1984-02-28 | Nasser & Associates |
| Mohamed Aniz Bin Bazeer Ahamed | 5569 | Mechanical | 2023-07-27 | DSCO Group Pte. Ltd. |
| Mohamed Aslam Bin Mohamed Afdoli | 5672 | Electrical | 2024-07-26 | Jacobs International Consultants Pte. Ltd. |
| Mohamed Faisal Bin Mohamed Soffe | 5619 | Electrical | 2024-01-25 | SP Group |
| Mohamed Saumee Bin Mohamed Sulhan | 5278 | Electrical | 2019-12-05 | SP Group |
| Mohammad Rifdi Bin Mohamed Anwar Ersalle | 5790 | Mechanical | 2025-07-24 | Housing & Development Board |
| Mohd Ismadi Bin Mohamad | 3752 | Mechanical | 2002-09-12 | Emaan Inspection Pte. Ltd. |
| Mohd Kahliab Bin Zainal Abidin | 3330 | Mechanical | 1997-05-20 | Emaan Inspection Pte. Ltd. |
| Mok Charlotte | 5167 | Mechanical | 2018-10-18 | JL Engineering and Consultancy Services Pte. Ltd. |
| Mok Chin Ket | 1846 | Civil | 1982-11-23 | MCK Consultant |
| Mok Kam Tim @ Timmy Mok Kam Tim | 2590 | Electrical | 1990-08-15 | Energy Market Authority |
| Mok Kar Soon | 5177 | Electrical | 2018-10-18 | SWTS Consulting Engineers Pte. Ltd. |
| Mok Lip Wee Sandy | 3662 | Mechanical | 2001-09-18 | I.EM Engineering Consultants Pte. Ltd. |
| Mok Siow Juay | 2120 | Civil | 1985-02-15 | Zheng Keng Engineering & Construction Pte Ltd |
| Mok Yew Meng | 1815 | Civil | 1982-08-17 | - |
| Mooi Kok Keen | 3540 | Civil | 2000-05-16 | Mooi Kok Keen Consultants |
| Moy Mei Ling | 4494 | Civil | 2012-10-16 | CAGA Consultants Pte. Ltd. |
| Muhamad Rashid Bin Mansoor | 4483 | Electrical | 2012-10-16 | RES Engineering Pte. Ltd. |
| Muhammad Aman Mohamed Aboobucker | 4751 | Civil | 2016-02-16 | Aman Engineering Consultancy Pte. Ltd. |
| Muhammad Dzahir Bin Mohamed Zain Affandi | 5216 | Electrical | 2019-04-18 | SP Group |