| Business | Phone |
| Transport Workers Union 1951 Canton Rd, Marietta 30066 | (770) 425-6541 |
| Hotel Motel & Restaurant Union 2470 Windy Hill Rd Se, Marietta 30067 | (770) 525-2716 |
| International Assoc-Machinists 1032 S Marietta Pkwy Se, Marietta 30060 | (770) 428-3385 |
| National Assn-Letter Carriers 734 Roswell St Se, Marietta 30060 | (770) 422-4355 |
| American Postal Workers Union 395 Glover St Se, Marietta 30060 | (770) 428-2711 |