| Business | Phone |
| Engineering Solutions & Tech 11117 Shady Trl, Dallas 75229 | (972) 243-2227 |
| Engineering Design Svc 6647 Hillbriar Dr, Dallas 75248 | (972) 490-6776 |
| Webb Engineering Inc 8300 Douglas Ave, Dallas 75225 | (214) 706-9065 |
| Austin Aecom 5723 Boca Raton Dr, Dallas 75230 | (214) 361-9969 |
| Tim Bennett Engineering 10720 Miller Rd, Dallas 75238 | (972) 429-3993 |
| Gaf-Engineering 2600 Singleton Blvd, Dallas 75212 | (214) 905-9765 |