| Business | Phone |
| International Electrical Wrkrs 110 N Warren St, Helena 59601 | (406) 442-3185 |
| International Electrical Wrkrs 1361 Elm St, Helena 59601 | (406) 443-7475 |
| Ironworkers Local 110 N Warren St, Helena 59601 | (406) 442-3648 |
| Mea Mft Southwest Field Office 1232 E 6th Ave, Helena 59601 | (406) 442-2123 |
| Mea-Mft 810 Hialeah Ct, Helena 59601 | (406) 442-2123 |