| # | Company name | Role | # of Projects |
|---|---|---|---|
| 1 | 1st Team Engineering Ltd. | civil engineering | 1 |
| 2 | A & A Consultants | civil engineering | 0 |
| 3 | A A Engineering | civil engineering | 1 |
| 4 | A. Aka Ltd. | civil engineering | 1 |
| 5 | A. ALTENBACH GmbH & Cie | civil engineering | 1 |
| 6 | Abaco Engineering Inc | civil engineering | 1 |
| 7 | Abbey Civil Engineers Inc | civil engineering | 2 |
| 8 | Abbey Pynford PLC | civil engineering | 0 |
| 9 | Abbington Associates Inc. | civil engineering | 0 |
| 10 | A B Consultants | civil engineering | 1 |
| 11 | Abd Engineers & Surveyors | civil engineering | 26 |
| 12 | Abend Associates | civil engineering | 0 |
| 13 | AB Engineering Inc. | civil engineering | 1 |
| 14 | Abercrombie and Associates | civil engineering | 1 |
| 15 | Abmb Inc | civil engineering | 2 |
| 16 | Abrahamson & Associates | civil engineering | 1 |
| 17 | ABS & Associates | civil engineering | 1 |
| 18 | Absolute Engineering | civil engineering | 1 |
| 19 | Access Engineering & Consulting Inc | civil engineering | 3 |
| 20 | Ace Pacific Co | civil engineering | 1 |