| # | Company name | Role | # of projects |
|---|---|---|---|
| 121 | HWA Parking | Consultancy | 1 |
| 122 | HWS Consulting Group Inc. (Omaha) | Consultancy | 0 |
| 123 | Hyder Consulting (Bangkok) Ltd | Consultancy | 1 |
| 124 | Hyder Consulting (Hong Kong) Limited | Consultancy | 14 |
| 125 | Hyder Consulting Ltd. | Consultancy | 9 |
| 126 | Hyder Consulting Ltd. | Consultancy | 1 |
| 127 | Hyder Consulting Middle East Limited | Consultancy | 66 |
| 128 | Hyder Consulting Pty Ltd. | Consultancy | 20 |
| 129 | Hydrosystems Inc | Consultancy | 1 |