| Business | Phone |
| United Steel Workers Local 1220 W 13th St, Joplin 64804 | (417) 781-1470 |
| Western Missouri & Kansas 2001 Empire Ave, Joplin 64804 | (417) 621-0919 |
| Joplin Area Local 2001 Empire Ave, Joplin 64804 | (417) 624-4833 |
| Joplin Nea 512 E 32nd St, Joplin 64804 | (417) 782-3230 |
| General Drivers & Helpers 1601 S Maiden Ln, Joplin 64801 | (417) 623-0640 |
| Ibew 3316 S Main St, Joplin 64804 | (417) 623-2025 |
| Carpenters 719 1/2 S Main St, Joplin 64801 | (417) 623-6480 |
| Communications Workers-America 4710 S Jackson Ave, Joplin 64804 | (417) 623-2541 |
| Construction & Gen Laborers 2001 Empire Ave, Joplin 64804 | (417) 623-5458 |