| Business | Phone |
| Afscme 530 San Pedro Ave 106, San Antonio 78212 | (210) 224-0749 |
| Bexar County Fed-Teachers 5800 Park Ten Blvd, San Antonio 78205 | (210) 227-8083 |
| Cleat-San Antonio 1939 Ne Loop 410 210, San Antonio 78217 | (210) 826-1899 |
| Decorators Union 121 Villita St, San Antonio 78205 | (210) 212-6899 |
| Iatse Theatrical Stage Empls 206 San Pedro Ave 306, San Antonio 78205 | (210) 223-3911 |
| Ibew 1504 E Commerce St, San Antonio 78205 | (210) 226-2301 |
| International Union 125 Villita St, San Antonio 78205 | (210) 226-6440 |
| International Union-Elect Elec 1603 Babcock Rd, San Antonio 78229 | (210) 340-8636 |
| Laborers International Union 738 W Hildebrand Ave, San Antonio 78212 | (210) 732-4154 |
| Laborers International Union 8546 Broadway St 107, San Antonio 78217 | (210) 805-8326 |
| National Assn-Letter Carriers 125 W Grayson St, San Antonio 78212 | (210) 227-0128 |
| Painters Local Union 311 S Saint Marys St, San Antonio 78205 | (210) 533-2433 |
| San Antonio Building & Constr 311 S Saint Marys St 15e, San Antonio 78205 | (210) 226-8447 |
| San Antonio Firefighters Assn 8925 W Ih 10, San Antonio 78230 | (210) 699-9369 |
| San Antonio Police Officers 1939 Ne Loop 410 300, San Antonio 78217 | (210) 822-4428 |
| Sheet Metal Wrkers Local Union 130 Ave Del Rey, San Antonio 78216 | (210) 349-3350 |
| South Texas Electrical Jatc 2503 Blanco Rd, San Antonio 78212 | (210) 731-9096 |
| Texas Carpenters & Millwrights 5364 Fredericksburg Rd, San Antonio 78229 | (210) 366-4133 |
| Texas State Employees Union 454 Soledad St R200, San Antonio 78205 | (210) 354-2900 |
| American Federation 6800 Park Ten Blvd, San Antonio 78213 | (210) 735-8900 |
| Communications Workers-America 1027 N Saint Marys St, San Antonio 78215 | (210) 224-6143 |
| Commercial Workers-Indust Div 1818 S New Braunfels Ave, San Antonio 78210 | (830) 914-3755 |
| Deputy Sheriffs Assn 816 Camaron St 214, San Antonio 78212 | (210) 223-2213 |
| Ibew 7205 S Ww White Rd, San Antonio 78222 | (210) 337-1741 |
| Industrial Technical & Pro 9107 Marbach Rd, San Antonio 78245 | (210) 670-8417 |
| Npmhu 10410 Perrin Beitel Rd, San Antonio 78284 | (210) 946-5257 |
| Seiu Local 5 1405 N Main Ave 200, San Antonio 78212 | (210) 225-1967 |
| Ibew 2547 Goliad Rd, San Antonio 78223 | (210) 337-1988 |
| Teamsters Local Union 8214 Roughrider Dr, San Antonio 78239 | (210) 590-2013 |
| United Public Workers Of Texas 115 E Sayers Ave, San Antonio 78214 | (210) 932-1959 |
| Labor Relations Solutions 715 Morning Hill St, San Antonio 78232 | (210) 496-7955 |
| Afl-Cio 229 Billy Mitchell Rd, San Antonio 78226 | (210) 431-2700 |
| American Federation Government 1871 Kirtland St 6149, San Antonio 78236 | (210) 674-5350 |
| Industrial Technical & Pro Bldg 9050, San Antonio 78236 | (210) 673-7403 |
| Teamsters 303 Clarence Tinker Dr, San Antonio 78226 | (210) 924-5819 |
| American Federation Government Bldg 705, San Antonio 78235 | (210) 532-3442 |
| National Alliance Of Public 303 El Paso St, San Antonio 78207 | (210) 212-6273 |
| Plumbers & Pipe Fitters 3630 Belgium Ln, San Antonio 78219 | (210) 226-1244 |
| Teamsters Local Union 1803 S Presa St, San Antonio 78210 | (210) 532-3572 |
| Ufw Afl-Cio 1410 Guadalupe St, San Antonio 78207 | (210) 212-7101 |
| Alamo Workforce Business Servc 2538 Castroville Rd, San Antonio 78237 | (210) 224-4357 |
| American Postal Workers Union 812 S Presa St, San Antonio 78210 | (210) 271-0853 |