| Astorino | Firms (Headquarters) |
| Celli-Flynn Brennan Architects & Planners | Firms (Headquarters) |
| Consol Energy Center | Hockey Arenas |
| David L. Lawrence Convention Center | Convention Centers |
| GBBN Architects | Firms (Office Location) |
| Gensler | Firms (Office Location) |
| Heinz Field | Football Stadiums |
| IKM | Firms (Headquarters) |
| L. R. Kimball (Architecture) | Firms (Office Location) |
| Perkins Eastman | Firms (Office Location) |
| Pieper O'Brien Herr Architects | Firms (Office Location) |
| PNC Park | Baseball Stadiums |
| Stantec Inc. | Firms (Office Location) |
| Urban Design Associates | Firms (Headquarters) |
