| Business | Phone |
| Intersystems Inc 9701 Royal Lytham Dr, Plano 75025 | (214) 495-9713 |
| Charles R Foster 7300 Paul Calle Dr, Plano 75025 | (972) 618-2467 |
| Fickes Engineering & Code Plano 75074 | (972) 423-0203 |
| Mrt Engineering 1104 Summit Ave, Plano 75074 | (972) 881-7363 |
| Cybernet Engineering 2400 Stone Creek Dr, Plano 75075 | (972) 398-8559 |
| Facilities Engineering 3548 Big Horn Trl, Plano 75075 | (972) 596-6767 |
| Honeycutt Consulting 1405 Quill Dr, Plano 75075 | (972) 423-2536 |
| Tops Engineering Corp 1721 W Plano Pkwy, Plano 75075 | (972) 881-8677 |
| Brandt Engineering 6002 W Parker Rd, Plano 75093 | (972) 378-0601 |
| Gregory H Wilson Engineering 2301 Ohio Dr, Plano 75093 | (972) 596-9265 |
| Paragon Structural Engineering 5068 W Plano Pkwy 199, Plano 75093 | (214) 941-8350 |
| Richard H Rose Engineers Po Box 940371, Plano 75094 | (972) 423-7050 |