| Business | Phone |
| Dmjm Harris 444 Liberty Ave # 500, Pittsburgh 15222 | (412) 395-8888 |
| Doody Engineering 181 Longuevue Dr, Pittsburgh 15228 | (412) 341-7927 |
| Engineering Mechanics Inc 4636 Campbells Run Rd, Pittsburgh 15205 | (412) 788-3650 |
| Gateway Engineers Inc 1011 Alcon St, Pittsburgh 15220 | (412) 921-4030 |
| Innovative Consulting Group 1910 Cochran Rd # 170, Pittsburgh 15220 | (412) 306-0139 |
| J Zaenger & Assoc 102 Greyfriar Dr, Pittsburgh 15215 | (412) 963-7780 |
| Killam Associates 1600 W Carson St, Pittsburgh 15219 | (412) 497-2900 |
| Landtech Engineering Inc 7805 Mcknight Rd # 202, Pittsburgh 15237 | (412) 635-8220 |
| Mackin Engineering Co 117 Industry Dr, Pittsburgh 15275 | (412) 788-0472 |
| Mc Ilvried Didiano & Mox Llc 8851 Kind Dr, Pittsburgh 15237 | (724) 934-2810 |
| Resource International 500 Mcknight Park Dr, Pittsburgh 15237 | (412) 630-9420 |
| Solar Testing Laboratories Inc 3862 East St, Pittsburgh 15214 | (412) 231-8600 |
| Tait Engineering 908 Perry Hwy # 2, Pittsburgh 15229 | (412) 364-6090 |
| Wilbur Smith Assoc 501 Martindale St # 4, Pittsburgh 15212 | (412) 323-8101 |
| Youchak & Youchak 932 W North Ave, Pittsburgh 15233 | (412) 323-8840 |