| Zhang Yaodong | 4532 | Civil | 2013-10-17 | Surbana Jurong Consultants Pte. Ltd. |
| Zhang Zhe | 3891 | Civil | 2004-05-05 | Chong & Lee Consulting Engineers LLP |
| Zhao Chen | 5575 | Civil | 2023-07-27 | Yantron (Singapore) Pte. Ltd. |
| Zhao Dianfeng | 4858 | Civil | 2017-03-23 | APEX BUILDING SOLUTIONS PTE LTD |
| Zhao Shuliang | 4729 | Civil | 2015-10-14 | PH Consulting Pte. Ltd. |
| Zhao Xinyue | 5765 | Civil | 2025-05-22 | BG&E Consulting Engineers Pte. Ltd. |
| Zhao Yanming | 5838 | Civil | 2026-01-22 | Have Engineering |
| Zhao Zhe | 4690 | Civil | 2015-06-18 | Building and Construction Authority |
| Zheng Guo | 4658 | Civil | 2015-01-09 | WSP Consultancy Pte. Ltd. |
| Zheng Shijie | 4674 | Civil | 2015-04-16 | Yantron (Singapore) Pte. Ltd. |
| Zheng Zexi | 5806 | Civil | 2025-10-23 | Arup Singapore Private Limited |
| Zheng Zhijian | 4385 | Civil | 2011-01-19 | PE Consultants Pte. Ltd. |
| Zhong Weiliang | 5649 | Mechanical | 2024-06-27 | - |
| Zhou Bo | 5272 | Electrical | 2019-10-17 | Housing & Development Board |
| Zhou Hanbin | 4286 | Civil | 2008-05-15 | China Harbour (Singapore) Engineering Company Pte Ltd |
| Zhou Hao | 5674 | Electrical | 2024-07-26 | Aster Chemicals and Energy Pte. Ltd. |
| Zhou Lin | 5395 | Civil | 2021-02-25 | T.Y.Lin International Pte. Ltd. |
| Zhou Tongquan | 3294 | Civil | 1997-02-18 | Tenwit Consultants Pte. Ltd. |
| Zhou Yanjun | 4639 | Civil | 2014-10-21 | Blueprint Engineering Consultants Pte. Ltd. |
| Zhu Dongqi | 4339 | Civil | 2010-02-18 | DQ Consulting Pte. Ltd. |
| Zhuang Guan Min | 3772 | Civil | 2002-11-19 | AECOM Singapore Pte. Ltd. |
| Zhuang Shimin | 5226 | Civil | 2019-06-20 | IntegreX Consulting |
| Zhuang Ziwei | 4943 | Chemical | 2017-09-19 | Xylem Water Solutions Singapore Pte. Ltd. |
| Zong Deshui | 4323 | Civil | 2009-08-20 | Surbana Jurong Consultants Pte. Ltd. |
| Zou Lei | 5601 | Civil | 2023-11-23 | Sentosa Development Corporation |