| # | Company name | Role | # of projects |
|---|---|---|---|
| 1 | ABE Enterprises, Inc. | Geotechnical engineering | 1 |
| 2 | Alt & Witzig Engineering, Inc. | Geotechnical engineering | 6 |
| 3 | Alt & Witzig Engineering, Inc. | Geotechnical engineering | 2 |
| 4 | AMEC Earth & Environmental Division | Geotechnical engineering | 3 |
| 5 | Amir Engineering Ltd. | Geotechnical engineering | 1 |
| 6 | ARCADIS Geotecnica SA | Geotechnical engineering | 0 |
| 7 | ASC Geosciences, Inc. | Geotechnical engineering | 6 |
| 8 | Ash Creek Associates, Inc. | Geotechnical engineering | 1 |
| 9 | Asset Geotechnical Engineering | Geotechnical engineering | 1 |
| 10 | ATC Associates, Inc. | Geotechnical engineering | 1 |
| 11 | Avraham Shani Engineers | Geotechnical engineering | 10 |