| Business | Phone |
| Stancil & Co 125 E John Carpenter Fwy 900, Irving 75062 | (214) 688-0255 |
| Professional Engineering Irving 75060 | (972) 579-0070 |
| Tsao Consultants Inc 1825 W Walnut Hill Ln, Irving 75038 | (972) 714-9490 |
| Wiss Janney Elstner Assoc 3050 Regent Blvd 100, Irving 75063 | (972) 373-9408 |