| Business | Phone |
| Barry-Wehmiller Design Group 2012 Renaissance Blvd # 110, King Of Prussia 19406 | (610) 239-7770 |
| Fonda Engineering Assocs 649 S Henderson Rd, King Of Prussia 19406 | (610) 337-3311 |
| Hdr Engineering Inc 630 Freedom Business Ctr Dr, King Of Prussia 19406 | (610) 768-7737 |
| Milsys Technologies 1018 W 9th Ave, King Of Prussia 19406 | (610) 354-9100 |