| Business | Phone |
| Pate Engineers Inc 13333 Northwest Fwy 300, Houston 77040 | (713) 462-3178 |
| Amani Engineering Inc 8313 Southwest Fwy 100, Houston 77074 | (713) 270-5700 |
| Carroll Consultants 10260 Westheimer Rd 600, Houston 77042 | (281) 531-6709 |
| Chiang Patel & Yerby Inc 2925 Briarpark Dr 850, Houston 77042 | (713) 532-1730 |
| Aestimo 955 Dairy Ashford St 204, Houston 77079 | (281) 556-1522 |
| Allied Energy Corp 1313 Post Oak Blvd 2200, Houston 77056 | (713) 965-5180 |
| Espa Corp 7120 Grand Blvd 100, Houston 77054 | (713) 680-0080 |
| Frontier Engineering & Design 7419 Magnolia Shadows Ln, Houston 77095 | (281) 550-2049 |
| Gene Carroll & Assoc 16010 Barkers Point Ln 105, Houston 77079 | (281) 509-5700 |
| Jns Consulting Engineers Inc 17171 Park Row, Houston 77084 | (713) 973-9139 |
| Moning Enterprises 2116 Berry St, Houston 77004 | (713) 630-0248 |
| Morris & Assoc Engineers Inc 9520 Telge Rd, Houston 77095 | (281) 855-6433 |