| Business | Phone |
| Vreeland Engineers Inc 3107 Sutherland Ave, Knoxville 37919 | (865) 637-4451 |
| B & B Ind Sales 3103 Bogie Ln, Knoxville 37918 | (865) 281-2907 |
| Energy Systems & Automation 1220 Wenlock Rd, Knoxville 37922 | (865) 693-7229 |
| Enernex Corp 144 Market Place Blvd, Knoxville 37922 | (865) 691-5540 |
| Epri-Peac Corp 942 Corridor Park Blvd, Knoxville 37932 | (865) 966-5429 |
| Geiger & Assoc 321 N Forest Park Blvd, Knoxville 37919 | (865) 588-1499 |