| Business | Phone |
| Afscme 915 13th St, Modesto 95354 | (209) 524-4718 |
| American Postal Workers Union 1423 Standiford Ave # 2, Modesto 95350 | (209) 524-8894 |
| Cannery Workers Union 1222 I St, Modesto 95354 | (209) 522-9006 |
| Central Labor Council 1125 Kansas Ave, Modesto 95351 | (209) 523-8079 |
| Communications Workers-America 1125 Kansas Ave, Modesto 95351 | (209) 524-9418 |
| Csea Modesto Chapter 7 305 Jennie St, Modesto 95354 | (209) 526-9155 |
| Ibew 1925 Yosemite Blvd, Modesto 95354 | (209) 579-5417 |
| Ibew 519 12th St, Modesto 95354 | (209) 524-5171 |
| Joint Council Of Teamsters 1209 K St, Modesto 95354 | (209) 577-0500 |
| Laborers Local 2549 Yosemite Blvd # K, Modesto 95354 | (209) 521-9883 |
| Modesto Fire Fighters Iaff 1214 I St, Modesto 95354 | (209) 523-1289 |
| Operating Engineers 538 Mchenry Ave # B, Modesto 95354 | (209) 529-7377 |
| Sheet Metal Workers 841 Lone Palm Ave, Modesto 95351 | (209) 523-1138 |
| Teamsters 1225 13th St, Modesto 95354 | (209) 526-2755 |
| Teamsters Alcohol Rehab Prog 1620 N Carpenter Rd # C12, Modesto 95351 | (209) 572-6966 |
| Ufcw 2007 Yosemite Blvd, Modesto 95354 | (209) 529-0596 |
| United Domestic Workers 500 9th St # G, Modesto 95354 | (209) 388-1525 |
| United Public Employees Local 1100 Carver Rd, Modesto 95350 | (209) 526-0210 |
| Winery Distillery & Allied 329 Downey Ave, Modesto 95354 | (209) 524-4245 |