| Wee Yian Soon | 2278 | Civil | 1986-08-21 | YS Wee Consultants |
| Wei Jiabao | 5897 | Civil | 2026-05-28 | Surbana Jurong Consultants Pte. Ltd. |
| Wei Jianyu | 4671 | Civil | 2015-04-16 | Geoconsult Asia Singapore Pte Ltd |
| Wen Dazhi | 3677 | Civil | 2001-11-20 | Changi Airport Group (Singapore) Pte. Ltd. |
| Wendy Chan Sze Yean | 5023 | Civil | 2018-02-13 | Changi Airport Group (Singapore) Pte. Ltd. |
| Wesley Gerard D'Aranjo | 2991 | Electrical | 1994-03-16 | Beth-El (Asia Pacific) Pte. Ltd. |
| Whye Yip Kwong | 2286 | Electrical | 1986-11-20 | Whye & Associates Pte. Ltd. |
| Widjaja Wong | 4299 | Civil | 2009-03-19 | WYN (South East Asia) Pte. Ltd. |
| William Derek Van Der Hulst | 3524 | Mechanical | 2000-01-18 | De Vie Works |
| Willie Chai Wei Shung | 5085 | Civil | 2018-06-21 | Building and Construction Authority |
| Win Shwe | 5773 | Electrical | 2025-06-19 | ON Engineers Pte. Ltd. |
| Win Tun Lin | 5430 | Civil | 2021-11-25 | Aurecon Singapore (Pte.) Ltd. |
| Wisnu Saputra | 5694 | Civil | 2024-08-23 | COWI Singapore Pte. Ltd. |
| Woh Sow Choon | 1943 | Civil | 1983-07-26 | SC Woh Consulting Engineers |
| Wong Boon Kok | 4636 | Electrical | 2014-10-21 | AK Engineering And Consultancy Pte. Ltd. |
| Wong Chee Meng | 4487 | Electrical | 2012-10-16 | Ngee Cheng Electric Co (Private) Limited |
| Wong Chee Teck William | 2778 | Mechanical | 1992-03-18 | JT Technology |
| Wong Chen Ming | 2384 | Electrical | 1988-05-18 | Ngee Cheng Electric Co (Private) Limited |
| Wong Chi Fun | 3712 | Civil | 2002-06-21 | Building and Construction Authority |
| Wong Chi Keong | 2082 | Civil | 1984-08-28 | E3 Consulting Engineers LLP |
| Wong Chin Jong | 4335 | Civil | 2009-11-19 | Fong Consult Pte. Ltd. |
| Wong Chin Sim Vincent | 4025 | Mechanical | 2006-04-18 | Land Transport Authority |
| Wong Chin Yik | 5660 | Civil | 2024-06-27 | KTP Consultants Pte Ltd |
| Wong Chiu Boon | 4589 | Electrical | 2014-03-20 | PSA Corporation Ltd |
| Wong Cuen Lin | 4754 | Civil | 2016-02-16 | WCT Consultants Pte. Ltd. |
| Wong Ee Peng | 4619 | Electrical | 2014-08-21 | Ignesis Engineering Pte. Ltd. |
| Wong Ee Ven | 4091 | Mechanical | 2006-11-21 | Keppel Real Estate Management Pte Ltd |
| Wong Fee Min Alfred | 4422 | Mechanical | 2011-10-20 | ECAS Consultants Pte. Ltd. |
| Wong Foo Cheong | 5528 | Civil | 2023-04-27 | Arup Singapore Private Limited |
| Wong Fook Thong | 4103 | Civil | 2007-01-26 | P & T Consultants Pte. Ltd. |