| Business | Phone |
| Alcala & Assoc Inc 2560 N Coyote Dr # 103, Tucson 85745 | (520) 623-7773 |
| Aseaji 9061 E Bears Circle Dr, Tucson 85749 | (520) 749-3095 |
| Bowden Engineering Inc 4585 E Speedway Blvd # 106, Tucson 85712 | (520) 326-8020 |
| Electrical Consultants 7493 N Oracle Rd # 203, Tucson 85704 | (520) 219-9933 |
| Electrical Design Assoc 231 W Giaconda Way # 129, Tucson 85704 | (520) 622-2196 |
| Tucson Desert Electronic 544 S Country Rd, Tucson 85705 | (520) 884-4744 |
| Sunrise Engineering & Design 1634 S Research Loop, Tucson 85710 | (520) 721-2735 |
| S & S Consulting Inc 2456 N Pantano Rd, Tucson 85715 | (520) 733-0909 |
| Richard Canney Engineering 5741 E Placita Varas, Tucson 85750 | (520) 615-8006 |