| Business | Phone |
| Boilermakers Local 374 6333 Kennedy Ave, Hammond 46323 | (219) 845-1000 |
| Boilermakers Local 524 7128 Arizona Ave, Hammond 46323 | (219) 844-1503 |
| Calumet Project For Ind Jobs 7128 Arizona Ave, Hammond 46323 | (219) 845-5008 |
| Ibew 2835 165th St, Hammond 46323 | (219) 844-6386 |
| Iron Workers Joint Apprentice 2820 165th St, Hammond 46323 | (219) 844-1397 |
| Laborers International Union 6415 Kennedy Ave, Hammond 46323 | (219) 844-1315 |
| Local 72 6431 Kennedy Ave, Hammond 46323 | (219) 221-0267 |
| National Assn-Letter Carriers 6223 Hohman Ave, Hammond 46324 | (219) 932-5453 |
| Northwest Indiana District 712 E Highland St, Hammond 46320 | (219) 852-1111 |
| Progressive Steel Workers Inc 1318 E 150th St, Hammond 46327 | (219) 933-6574 |