| Business | Phone |
| Mcbids Plan Room 11445 Commercial Pkwy, Castroville 95012 | (831) 633-6312 |
| Nalc 10361 Merritt St # 1, Castroville 95012 | (831) 633-2693 |
| Sheet Metal Workers Local 11060 Commercial Pkwy, Castroville 95012 | (831) 633-3585 |
| California School Employees Castroville 95012 | (831) 633-3906 |
| Central Labor Council-Monterey 10353 Merritt St, Castroville 95012 | (831) 633-1869 |
| Ibew 10300 Merritt St, Castroville 95012 | (831) 633-3063 |