| Business | Phone |
| Afl-Cio Knoxville Oak Ridge 311 Morgan St, Knoxville 37917 | (865) 523-9752 |
| Afl-Cio Technical Assistance 1415 Elm St, Knoxville 37921 | (865) 546-1463 |
| Uaw East Tennessee Retired 1124 N Broadway St, Knoxville 37917 | (865) 521-5061 |
| United Campus Workers-Cwa 1721 Cumberland Ave, Knoxville 37916 | (865) 329-0085 |
| United Transportation 7115 Rising Rd, Knoxville 37924 | (865) 522-6888 |
| Boilermakers' Construction 3020 Oneal St, Knoxville 37921 | (865) 637-7866 |
| Bricklayer's Local 5715 Old Tazewell Pike, Knoxville 37918 | (865) 687-6272 |
| Teamsters 2306 Montclair Ave, Knoxville 37917 | (865) 546-8373 |
| Tennessee Assn-Rescue Squads 2906 Tazewell Pike # B, Knoxville 37918 | (865) 688-7015 |
| Tennessee Industrial Renewal 1515 E Magnolia Ave # 403, Knoxville 37917 | (865) 637-1576 |
| Sheet Metal Workers 112 Hillcrest Dr, Knoxville 37918 | (865) 689-2928 |
| Carpenters District Council 516 W Vine Ave, Knoxville 37902 | (865) 525-9696 |
| Cement Masons 311 Morgan St, Knoxville 37917 | (865) 522-3000 |
| Construction Industry Outreach 311 Morgan St, Knoxville 37917 | (865) 637-8510 |
| Directions Associates 10420 Cogdill Rd, Knoxville 37932 | (865) 675-2000 |
| Engineering Association 34 Market Sq, Knoxville 37902 | (865) 637-7901 |
| Pilot Corp # 241 2801 E Gov John Sevier, Knoxville 37914 | (865) 546-6776 |
| Plumbers & Steamfitters 1216 N Broadway St, Knoxville 37917 | (865) 523-7413 |
| Plumbers & Steamfitters 1218 N Broadway St, Knoxville 37917 | (865) 546-5501 |
| Opeiu 411 S Gay St # D, Knoxville 37902 | (865) 637-6547 |
| Painters & Decorators 1000 Buchanan Ave, Knoxville 37917 | (865) 687-1787 |
| Painters Local 437 Health 1000 Buchanan Ave, Knoxville 37917 | (865) 687-4232 |
| Iatse 8715 Martin Mill Pike, Knoxville 37920 | (865) 609-0959 |
| Ibew 1530 Hutchinson Ave, Knoxville 37917 | (865) 524-8638 |
| Insulators & Asbestos Workers 826 Stewart St, Knoxville 37917 | (865) 524-0234 |
| Iron Workers Local Union 1000 Buchanan Ave, Knoxville 37917 | (865) 689-3371 |
| Knoxville Building & Constr 311 Morgan St, Knoxville 37917 | (865) 525-5124 |
| Knoxville Musicians Assn 2918 E Magnolia Ave, Knoxville 37914 | (865) 524-1897 |
| Laborers Local 10412 Lexington Dr, Knoxville 37932 | (865) 966-2009 |
| Joint Apprenticeship Committee 1216 N Broadway St, Knoxville 37917 | (865) 525-6305 |
| Joint Apprenticeship Committee 826 Stewart St, Knoxville 37917 | (865) 524-1063 |