| So Pan Huang | 5234 | Civil | 2019-06-20 | DQ Consulting Pte. Ltd. |
| Soe Moe Zin | 4831 | Civil | 2016-10-18 | JTC Corporation |
| Soh Chin Guan | 2623 | Civil | 1991-02-20 | BUCG Singapore Branch |
| Soh Eng Seng | 3627 | Electrical | 2001-05-11 | Kandenko Co., Ltd |
| Soh Jia Jie | 5378 | Mechanical | 2021-01-21 | Nxera SG Pte. Ltd. |
| Soh Kai Yea | 4182 | Electrical | 2007-04-19 | Mott MacDonald Singapore Pte Limited |
| Soh Kee Chung | 4918 | Civil | 2017-08-22 | GCS Engineers Pte. Ltd. |
| Soh Lian Seng | 3105 | Civil | 1995-03-15 | Engineers Alliance Pte. Ltd. |
| Soh Lin Heng | 5338 | Electrical | 2020-09-17 | T.Y.Lin International Pte. Ltd. |
| Soh Meng Seng | 2497 | Civil | 1989-07-19 | Cericorn Consultants |
| Soh Meng Tiong | 3817 | Mechanical | 2003-06-24 | Home Team Science and Technology Agency |
| Soh Siang Long | 5636 | Electrical | 2024-04-25 | Nxera SG Pte. Ltd. |
| Soh Swee Leng Yvonne | 3751 | Civil | 2002-08-16 | Ang & Ong Consultants Pte. Ltd. |
| Soh Swee Seng | 3366 | Electrical | 1997-10-21 | Housing & Development Board |
| Soh Yap Choon | 4194 | Electrical | 2007-04-19 | Energy Market Authority |
| Somasundaram Ashokvardhan | 4876 | Civil | 2017-05-22 | Mott MacDonald Singapore Pte Limited |
| Somehsa s/o Ponnampalam | 2019 | Civil | 1984-01-24 | Somehsa Geosciences Pte Ltd |
| Song Changyun | 5650 | Electrical | 2024-06-27 | Home Team Science and Technology Agency |
| Song Heliang | 5187 | Civil | 2018-12-14 | Ant Consultants Pte. Ltd. |
| Song Jianhong | 4592 | Civil | 2014-04-17 | COWI Singapore Pte. Ltd. |
| Song Siak Keong | 2585 | Civil | 1990-08-15 | CSAGE Consultants |
| Song Yanxin | 5291 | Civil | 2019-12-05 | A.CS Consultants Pte. Ltd. |
| Soo Chee Sern | 3000 | Civil | 1994-03-16 | CSCE Pte. Ltd. |
| Soo Khor Hock | 3147 | Civil | 1995-06-21 | Executive Decisions Inc. LLP |
| Soo Yet Chung | 3978 | Civil | 2005-06-21 | Home Consultant |
| Soo Yu Zhi Elaine | 5665 | Electrical | 2024-06-27 | Singapore Polytechnic |
| Soon Chern Yee | 4087 | Civil | 2006-10-17 | E-Struct Consulting Pte. Ltd. |
| Soon Teik Lam | 2878 | Civil | 1992-10-21 | STL Consultants |
| Soon Won Moi | 3972 | Civil | 2005-05-20 | Ramboll Pte. Ltd. |
| Stephen James Perkins | 4451 | Mechanical | 2012-06-21 | Beca Carter Hollings & Ferner (S.E.Asia) Pte Ltd |