| Business | Phone |
| Afscme 20 Winter St, Augusta 4330 | (207) 622-6191 |
| Aft-Maine 44 Industrial Dr # 116, Augusta 4330 | (207) 621-2854 |
| Carpenters Local Union 60 Industrial Dr, Augusta 4330 | (207) 621-8160 |
| Ibew 44 Industrial Dr, Augusta 4330 | (207) 621-6336 |
| Laborers International Union 2068 N Belfast Ave, Augusta 4330 | (207) 622-3551 |
| Maine Labor Group On Health 283 Water St, Augusta 4330 | (207) 622-7823 |
| Maine State Employees Assn 65 State St, Augusta 4330 | (207) 622-3151 |
| National Assn-Letter Carriers 18 Spruce St, Augusta 4330 | (207) 623-9438 |
| Nercc Organizing 60 Industrial Dr, Augusta 4330 | (207) 626-2943 |
| Pace International Union 124 State St, Augusta 4330 | (207) 621-2314 |
| Plumbers & Pipefitters 716 21 Gabriel Dr, Augusta 4330 | (207) 621-0006 |
| Telephone Workers Local 44 Industrial Dr, Augusta 4330 | (207) 623-2901 |