| Business | Phone |
| Texas Federation Of Teachers 17461 Village Green Dr A, Houston 77040 | (713) 466-1125 |
| Harris County Afl-Cio Council 2506 Sutherland St, Houston 77023 | (713) 928-2115 |
| International Union 2626 Sutherland St, Houston 77023 | (713) 926-9678 |
| Texas State District Council 2600 Hamilton St 103, Houston 77004 | (713) 752-0727 |
| Movie Operator's 3030 North Fwy, Houston 77009 | (713) 692-0279 |
| United Transportation Union 400 Randall Way, Houston 77010 | (713) 651-6577 |
| Pasadena Police Patrolmen's 1702 Strawberry St, Houston 77017 | (713) 472-2600 |
| Pipe Fitters Local Union 2507 1/2 Galveston Rd, Houston 77017 | (713) 242-8662 |
| Laborers International Union 2400 Lyons Ave, Houston 77020 | (713) 224-2527 |
| Roofers & Waterproofers Local 4806 Martin Luther King Blvd, Houston 77021 | (713) 748-6111 |
| Police U Aflcio 33 Lyerly St B14, Houston 77022 | (713) 696-5299 |
| United Mine Workers Of America 2506 Sutherland St, Houston 77023 | (713) 923-5010 |
| Seiu 4299 San Felipe St, Houston 77027 | (713) 514-0005 |
| Airline Pilots Assoc 3808 World, Houston 77032 | (281) 227-8920 |
| Houston Educational Support 2616 South Loop W, Houston 77054 | (713) 660-8435 |
| Sign & Pictorial Painters 2325 Naomi St, Houston 77054 | (713) 699-0993 |
| Aldine Federation Of Teachers 350 N Sam Houston Pkwy E 247, Houston 77060 | (281) 847-3050 |
| Iupat Local Unions 5425 Spindle Dr, Houston 77086 | (281) 847-9635 |
| Sign & Pictorial Painters 5425 Spindle Dr, Houston 77086 | (281) 431-3532 |
| United Steelworkers Of America 8703 Bold Forest Dr, Houston 77088 | (281) 272-0400 |
| Plasterers Local 8727 Kirkmont Dr, Houston 77089 | (281) 484-7911 |
| Seafarer's International Union 1221 Pierce St, Houston 77002 | (713) 659-5152 |
| Transport Workers Union 2150 W 18th St 104, Houston 77008 | (713) 864-4346 |
| Plumber's 468 Link Rd, Houston 77009 | (713) 862-4871 |
| Plumbers 502 Link Rd, Houston 77009 | (713) 869-3592 |
| United Steel Workers 12821 Industrial Rd, Houston 77015 | (713) 451-0995 |
| Pipe Fitters 2535 Galveston Rd, Houston 77017 | (713) 644-5521 |
| Transport Workers Union-Amer 2000 North Loop W 132, Houston 77018 | (713) 680-3273 |
| Teamsters 8799 North Loop E 300, Houston 77029 | (713) 672-8155 |
| Teamsters 4303 N Sam Houston Pkwy E, Houston 77032 | (713) 869-6371 |
| Seiu 2600 South Loop W 310, Houston 77054 | (713) 863-9877 |
| Texas State Employees Union 2656 South Loop W, Houston 77054 | (713) 661-9030 |
| United Food & Commercial Wrkrs 121 Northpoint Dr, Houston 77060 | (281) 448-5555 |
| Teamsters 10959 Ella Blvd 968, Houston 77067 | (281) 877-0968 |