| # | Company name | Role | # of projects |
|---|---|---|---|
| 1 | Hart Howerton | Planning consultant | 2 |
| 2 | Hart Howerton | Planning consultant | 7 |
| 3 | Hepher Dixon | Planning consultant | 4 |
| 4 | Hetzel, Tor-Westen + Partner Ingenieurgesellschaft mbH & Co. KG | Planning consultant | 5 |
| 5 | Hunter & Associates Ltd. | Planning consultant | 1 |