| Haider Tyebally Tyebally | 5370 | Mechanical | 2021-01-21 | Cundall Singapore Pte. Ltd. |
| Han Hongsheng | 4667 | Civil | 2015-03-19 | AECOM Singapore Pte. Ltd. |
| Han Jianguang, Clarence | 4944 | Chemical | 2017-09-19 | - |
| Han Kim Siew Vincent | 2420 | Mechanical | 1988-11-25 | VHA Consultants Pte. Ltd. |
| Han Tek Fong | 2793 | Electrical | 1992-05-20 | SP PowerGrid Limited |
| Han Tsae Juan | 3969 | Mechanical | 2005-05-20 | Nakheel LLC |
| Har Choong Meng | 3661 | Mechanical | 2001-09-18 | Team Design Consultants |
| Harianto Rahardjo | 3323 | Civil | 1997-05-20 | Nanyang Technological University |
| Harpal Singh s/o Kuldip Singh | 3334 | Civil | 1997-07-15 | Land Transport Authority |
| Hashim Bin Mansoor | 4168 | Mechanical | 2007-03-15 | Building and Construction Authority |
| Hatfield Raymond Laurie | 2762 | Civil | 1992-02-19 | PR Consultants Offshore |
| He Hao | 5237 | Civil | 2019-07-18 | TW-Asia Consultants Pte. Ltd. |
| He Hongbo | 5130 | Civil | 2018-08-16 | VCE Consultants & Engineering Pte. Ltd. |
| He Wen Wei | 4301 | Civil | 2009-03-19 | Frasers Property Limited |
| He Wenjie | 5008 | Civil | 2018-01-08 | HES Consultant |
| He Ye | 5407 | Electrical | 2021-03-25 | National University Health System |
| Hee Ah Mui | 2039 | Civil | 1984-02-28 | AECOM Singapore Pte. Ltd. |
| Hee Kok Shung | 5697 | Mechanical | 2024-08-23 | Home Team Science and Technology Agency |
| Hendri Tay | 5686 | Electrical | 2024-08-23 | SP Group |
| Heng Boon Leng | 3902 | Electrical | 2004-07-26 | SP Group |
| Heng Cheng Li | 5478 | Chemical | 2022-08-25 | National Environment Agency |
| Heng Chye Hing | 3800 | Mechanical | 2003-04-15 | EWC Engineers Pte. Ltd. |
| Heng Eu Chang Leonard | 3617 | Civil | 2001-05-11 | Defence Science and Technology Agency |
| Heng Jia Wang | 5592 | Civil | 2023-10-26 | Land Transport Authority |
| Heng Kim Huat | 3315 | Civil | 1997-05-20 | TW-Asia Consultants Pte. Ltd. |
| Heng Kok Hui | 4572 | Civil | 2014-01-16 | Heng Consulting Engineers |
| Heng Kuan Koon | 5280 | Electrical | 2019-12-05 | SP PowerGrid Limited |
| Heng Sew Chen | 4126 | Civil | 2007-02-23 | JTC Corporation |
| Henry Vong | 4907 | Civil | 2017-07-18 | Building and Construction Authority |
| Hew Foo Loong | 4853 | Mechanical | 2017-02-16 | AECOM Singapore Pte. Ltd. |