| Business | Phone |
| A A Sare Assoc Philadelphia 19102 | (215) 732-5206 |
| Compu Desygn Corp 7500 Germantown Ave # 302, Philadelphia 19119 | (215) 753-0288 |
| Wittes & Assoc Inc Consulting 325 S 13th St, Philadelphia 19107 | (610) 896-6578 |
| W J Castle & Assoc 1324 Locust St, Philadelphia 19107 | (215) 546-9787 |
| Urban Engineers 530 Walnut St # 14, Philadelphia 19106 | (215) 922-8080 |
| E T Techtonics 213 Monroe St, Philadelphia 19147 | (215) 592-7620 |
| Kachele Group 1218 Chestnut St # 502, Philadelphia 19107 | (215) 238-1994 |
| Lawson Bevan Engineers 2201 Pennsylvania Ave, Philadelphia 19130 | (215) 988-9321 |
| Martin Espenlaub Engineering 238 N 22nd St, Philadelphia 19103 | (215) 665-8570 |
| O'Donnell & Naccarato Inc 111 S Independence Mall E #950, Philadelphia 19106 | (215) 925-3788 |
| Schoor Depalma Inc 1700 Market St, Philadelphia 19103 | (215) 972-8100 |
| Thornton Tomasetti Group 1617 John F Kennedy Blvd # 545, Philadelphia 19103 | (215) 627-6300 |