| Business | Phone |
| Alstom Power 610 Epsilon Dr, Pittsburgh 15238 | (412) 967-0765 |
| Caplan Engineering Co 7531 Roslyn St, Pittsburgh 15218 | (412) 271-4700 |
| Cegelec Automation Inc 301 Alpha Dr, Pittsburgh 15238 | (412) 967-0765 |
| Hornfeck Engineering Inc 1020 N Canal St, Pittsburgh 15215 | (412) 781-1500 |
| I C Mechanics Inc 425 N Craig St, Pittsburgh 15213 | (412) 682-5560 |
| Indriss Inc 1105 Rochester Rd, Pittsburgh 15237 | (412) 367-0313 |
| Lovorn Engineering Assoc 100 43rd St, Pittsburgh 15201 | (412) 363-3070 |
| Richmond Engineering Works 1204 Parkway View Dr, Pittsburgh 15205 | (412) 787-9640 |
| Schroeder Engineering Inc 1095 Unity Center Rd, Pittsburgh 15239 | (412) 793-6242 |
| Starr Engineering 426 S Main St, Pittsburgh 15220 | (412) 921-1201 |