| # | Company name | Role | # of Projects |
|---|---|---|---|
| 1 | 20/10 Engineering Group | electrical engineering | 3 |
| 2 | 2H Engineering Corporation | electrical engineering | 11 |
| 3 | A3 Jenewein Ingenieurbüro GmbH | electrical engineering | 1 |
| 4 | Abacus Engineered Systems | electrical engineering | 3 |
| 5 | Accanti g. di f.a. | electrical engineering | 0 |
| 6 | AC Electric (brea) | electrical engineering | 0 |
| 7 | Acg Engineers Inc | electrical engineering | 0 |
| 8 | Ackerman Engineers | electrical engineering | 1 |
| 9 | Ackroyd Engineering LLC | electrical engineering | 1 |
| 10 | A C Systems Engineering | electrical engineering | 3 |
| 11 | Adonai Professional Services Inc. | electrical engineering | 0 |
| 12 | Advanced Engineering Concepts | electrical engineering | 4 |
| 13 | Aec Engineers Inc | electrical engineering | 3 |
| 14 | A & E Designers Inc | electrical engineering | 4 |
| 15 | Aeed Inc. | electrical engineering | 4 |
| 16 | A & F Engineering | electrical engineering | 1 |
| 17 | Affiliated Engineers Inc. | electrical engineering | 4 |
| 18 | After Image & Space | electrical engineering | 2 |
| 19 | A G C Engineering | electrical engineering | 1 |
| 20 | Aguila Engineers | electrical engineering | 0 |