| # | Firmenname | Rolle | # Projekte |
|---|---|---|---|
| 1 | 1st Team Engineering Ltd. | Tiefbauingenieur | 1 |
| 2 | A & A Consultants | Tiefbauingenieur | 0 |
| 3 | A A Engineering | Tiefbauingenieur | 1 |
| 4 | A B Consultants | Tiefbauingenieur | 1 |
| 5 | A E S Consulting Engrs | Tiefbauingenieur | 2 |
| 6 | A J Frick | Tiefbauingenieur | 1 |
| 7 | A J Terich Engineering | Tiefbauingenieur | 1 |
| 8 | A L Van Buskirk Engineer & Planners | Tiefbauingenieur | 3 |
| 9 | A. Aka Ltd. | Tiefbauingenieur | 4 |
| 10 | A. ALTENBACH GmbH & Cie | Tiefbauingenieur | 1 |
| 11 | A. Morton Thomas Associates, Inc. | Tiefbauingenieur | 11 |
| 12 | A.c.k Engineering | Tiefbauingenieur | 1 |
| 13 | A.D.A. Engineering, Inc. | Tiefbauingenieur | 2 |
| 14 | A.R. Miller Engineering, Inc. | Tiefbauingenieur | 7 |
| 15 | A.R. Sanguinetti & Associates | Tiefbauingenieur | 1 |
| 16 | A/S Ishøy & Madsen | Tiefbauingenieur | 14 |
| 17 | AB Engineering Inc. | Tiefbauingenieur | 1 |
| 18 | Abaco Engineering Inc | Tiefbauingenieur | 1 |
| 19 | Abbey Civil Engineers Inc | Tiefbauingenieur | 2 |
| 20 | Abbey Pynford PLC | Tiefbauingenieur | 0 |