| Name | Address, Zip |
| Local 20 Of Gary And Vicinity Sheetmetal Industry Labor Management Co | 6450 Ameriplex Dr, 46368-1389 |
| International Association Of Bridge Structural & Orna Iron Workers 395 | 6570 Ameriplex Dr 6570 Ameriplex Dr, 46368 |
| International Association Of Machinists & Aerospace Workers | 1784 Oakridge St, 46368-1114 |
| American Federation Of State County & Municipal Employees | 6632 Lagoon Way Apt 9, 46368-4280 |
| American Train Dispatchers Association | Po Box 813, 46368-0813 |
| American Federation Of Labor & Congress Of Industrial Orgs | 6570 Ameriplex Dr, 46368-7714 |
| International Longshoremens Assoc | 6031 Melton Rd, 46368-1314 |
| National Association Of Letter Carr Iers | 5554 Stone Ave, 46368-4338 |
| International Longshoremens Association | 6031 Melton Rd, 46368-1314 |
| International Longshoremens Association | 6613 Compass Dr, 46368-1103 |
| International Association Of Fire Fighters | Po Box 751, 46368-0751 |
| Brotherhood Of Maintenance Of Way Employees | 2275 Hamstrom Rd, 46368-2229 |
| United Steelworkers | 1919 Willowcreek Rd, 46368-1514 |
| United Steelworkers | 3141 Willowcreek Road, 46368-4468 |
| |