| Business | Phone |
| California Federation-Teachers 1757 Mesa Verde Ave # 250, Ventura 93003 | (805) 650-0066 |
| Cause 2021 Sperry Ave # 18, Ventura 93003 | (805) 658-0810 |
| Communications Workers-America 674 County Square Dr # 202b, Ventura 93003 | (805) 644-4453 |
| Ibew 3994 E Main St, Ventura 93003 | (805) 642-2149 |
| International Union-Oper Engrs 1094 E Main St, Ventura 93001 | (805) 643-8740 |
| Laborers International Union 21 S Dos Caminos St, Ventura 93003 | (805) 643-5487 |
| Nage 1819 Knoll Dr, Ventura 93003 | (805) 650-6983 |
| Operating Engineers 1655 Mesa Verde Ave, Ventura 93003 | (805) 656-1852 |
| Plasterers & Cement Masons Lcl 2299 E Main St, Ventura 93001 | (805) 653-5919 |
| Plumbers & Steamfitters 1955 N Ventura Ave, Ventura 93001 | (805) 643-6345 |
| Service Employee's Intl Union 2472 Eastman Ave # 30, Ventura 93003 | (805) 644-8291 |
| Teamsters Local Union 1534 Eastman Ave # B, Ventura 93003 | (805) 644-0070 |
| Ventura County Federation 1757 Mesa Verde Ave, Ventura 93003 | (805) 650-8035 |
| Ventura County Federation-Cllg Ventura 93003 | (805) 642-7143 |