| Business | Phone |
| Laborers International Union 1128 E La Cadena Dr, Riverside 92501 | (951) 684-1484 |
| Coalition Of Allied Student 3595 University Ave, Riverside 92501 | (951) 369-8075 |
| Coalition Of University 5005 Lamart Dr, Riverside 92507 | (951) 788-2558 |
| Communications Workers-America 3751 Mccray St, Riverside 92506 | (951) 784-9400 |
| Building & Construction Trades 1074 E La Cadena Dr # 8, Riverside 92501 | (951) 684-1040 |
| Ibew 1074 E La Cadena Dr # 5, Riverside 92501 | (951) 784-7507 |
| International Association-Mach Riverside 92503 | (951) 354-2343 |
| International Association-Mach 6086 Montgomery St, Riverside 92503 | (951) 689-3353 |
| Laborers Training Retraining 1168 E La Cadena Dr, Riverside 92501 | (951) 683-3996 |
| Riversides Sheriffs Assn 6215 River Crest Dr # A, Riverside 92507 | (951) 653-0130 |
| Roofers & Waterproofers 1074 E La Cadena Dr, Riverside 92501 | (951) 684-3645 |
| Seiu Healthcare Justice 4336 Market St, Riverside 92501 | (951) 784-4698 |
| United Domestic Workers-Amer 3600 Lime St # 421, Riverside 92501 | (951) 786-1300 |
| United Public Employees 4000 10th St, Riverside 92501 | (951) 682-4590 |
| University Prof & Tech Empl 5005 Lamart Dr # 100b, Riverside 92507 | (951) 781-7922 |
| United Steelworkers Of America 10600 Magnolia Ave # E, Riverside 92505 | (951) 785-7647 |