| Business | Phone |
| Webb Murray & Assoc Inc 2615 E Beltway 8 S, Pasadena 77503 | (281) 991-4227 |
| Texas Gulf Coast Engineers 1149 Ellsworth Dr 410, Pasadena 77506 | (713) 477-8682 |
| Regan Technical Svc 3009 Hays St, Pasadena 77503 | (713) 473-1059 |
| Trans-State Industries Inc 2534 Violet St, Pasadena 77503 | (281) 487-2251 |
| Williams Engineering & Constr 3218 Spencer Hwy, Pasadena 77504 | (713) 944-6626 |