| Business | Phone |
| Facility Engineering Assoc Pc 2611 Westgrove Dr, Carrollton 75006 | (972) 759-4406 |
| Wunderlich-Malec Engineering 2855 Trinity Square Dr 100, Carrollton 75006 | (469) 574-2500 |
| Tompkins & Assoc 2201 Midway Rd 108t, Carrollton 75006 | (972) 661-0192 |
| Texas Engineering Systems 3630 N Josey Ln 100, Carrollton 75007 | (972) 395-2013 |