| Business | Phone |
| Mc Nichols Co-Houston 16405 Air Center Blvd 100, Houston 77032 | (281) 443-8400 |
| Ludlow-Saylor Division 6100 Griggs Rd, Houston 77023 | (713) 645-6490 |
| Jackson International Inc 1450 N Post Oak Rd, Houston 77055 | (713) 988-3838 |
| Jackson Wire Intl Inc 1450 N Post Oak Rd, Houston 77055 | (713) 957-8895 |