| # | Company name | Role | # of projects |
|---|---|---|---|
| 1 | B L & P Engineers, Inc | MEP engineering | 7 |
| 2 | B.C. Engineering, Inc. | MEP engineering | 0 |
| 3 | B&A Consulting Engineers | MEP engineering | 8 |
| 4 | B&I Contractors, Inc. | MEP engineering | 25 |
| 5 | Bacik, Karpinski Associates, Inc. | MEP engineering | 3 |
| 6 | Bähr Ingenieure GmbH | MEP engineering | 12 |
| 7 | Bähr Werner Ingenieurbüro GmbH | MEP engineering | 1 |
| 8 | Bansal & Associates, Inc. | MEP engineering | 2 |
| 9 | Barbanel | MEP engineering | 13 |
| 10 | Bard, Rao + Athanas Consulting Engineers | MEP engineering | 50 |
| 11 | Barrett Woodyard & Associates, Inc. | MEP engineering | 18 |
| 12 | Batson Bravo Engineers | MEP engineering | 5 |
| 13 | BCER Engineering, Inc. | MEP engineering | 4 |
| 14 | Beca Carter Hollings & Ferner | MEP engineering | 4 |
| 15 | Beca Carter Hollings and Ferner (South East Asia) Private Limited | MEP engineering | 79 |
| 16 | Beca Group | MEP engineering | 6 |
| 17 | Becker-Huke-Hoffmann GmbH | MEP engineering | 2 |
| 18 | Beckett Engineering | MEP engineering | 1 |
| 19 | Beitmen & Huyett Inc. | MEP engineering | 0 |
| 20 | Benbassat & Sporidis Company | MEP engineering | 10 |