| Business | Phone |
| Mail Handlers Union 2901 S Interstate 85 Service, Charlotte 28228 | (704) 392-1573 |
| Mail Handlers Union 4400 Northlake Ct, Charlotte 28216 | (704) 596-7783 |
| Association-Flight Attendants 2606 Dilworth Heights Ln, Charlotte 28209 | (704) 335-0417 |
| Teamsters Joint Council 5000 N Tryon St, Charlotte 28213 | (704) 598-0308 |
| Charlotte Exhibition & Display 4037 E Independence Blvd, Charlotte 28205 | (704) 568-9980 |
| Southern Piedmont Central Charlotte 28202 | (704) 953-3033 |
| Communications Workers-America 5108 Monroe Rd, Charlotte 28205 | (704) 568-3603 |
| Communications Workers-America 756 Tyvola Rd # 115, Charlotte 28217 | (704) 665-9940 |
| General Motors Parts Uaw 10815 Quality Dr, Charlotte 28278 | (704) 587-4712 |
| Iatse 4037 E Independence Blvd # 601, Charlotte 28205 | (704) 367-9435 |
| Ibew 1409 East Blvd, Charlotte 28203 | (704) 372-9218 |
| International Association-Mach 3100 Piper Ln # C, Charlotte 28208 | (704) 357-0027 |