| Business | Phone |
| American Postal Workers Union 450 Jackson St, Columbus 47201 | (812) 372-1138 |
| Teamsters Local Union 410 Hope Ave, Columbus 47201 | (812) 378-4534 |
| Carpenters 380 Plaza Dr # E, Columbus 47201 | (812) 372-4063 |
| Carpenters Union 431 S Mapleton St, Columbus 47201 | (812) 376-6508 |
| Diesel Workers Union 602 Reeves Way, Columbus 47201 | (812) 376-8461 |
| Ibew 1109 16th St, Columbus 47201 | (812) 372-2311 |
| Laborers International Union 431 S Mapleton St, Columbus 47201 | (812) 372-2211 |
| Office Committee Union 1933 10th St, Columbus 47201 | (812) 377-7211 |