| Business | Phone |
| Avionics Engineering Svc 6416 E Tanque Verde Rd # C, Tucson 85715 | (520) 886-8520 |
| Ayer Engineering Co 1250 W Roger Rd, Tucson 85705 | (520) 888-6112 |
| D & E Sales & Engineering 6751 E Hayne St, Tucson 85710 | (520) 885-4000 |
| Haak & Assoc Inc 9009 E Maple Leaf Dr, Tucson 85710 | (520) 886-4762 |
| Whitelites 2100 N Wilmot Rd, Tucson 85712 | (520) 296-6700 |
| Vulcan 3720 N Placita Chivo, Tucson 85749 | (520) 760-3227 |
| Twin Feathers Enterprises 2145 N El Camino Rinconado, Tucson 85749 | (520) 760-1318 |
| Southwest Engineering & Constr 7750 E Calle Del Minique, Tucson 85750 | (520) 615-7765 |
| Southwestern Consulting Egnrs 435 E 9th St, Tucson 85705 | (520) 628-1062 |
| Stantec Consulting Inc 201 N Bonita Ave, Tucson 85745 | (520) 750-7474 |
| Sundanzer 742 E 46th St, Tucson 85713 | (520) 882-9100 |
| Sacra Engineering 215 W Giaconda Way # 107, Tucson 85704 | (520) 622-3484 |
| P S Engineering Inc 720 W Landoran Ln, Tucson 85737 | (520) 797-1505 |
| Ore Body Engineering Ltd 1721 E Glenn St, Tucson 85719 | (520) 323-7996 |
| Millennium Engineering 1130 E Pennsylvania St, Tucson 85714 | (520) 889-8077 |
| M 3 Engineering 60 W Stone Loop, Tucson 85704 | (520) 887-4837 |
| Magee Engineering 1010 N 5th Ave, Tucson 85705 | (520) 623-2152 |
| Jamieson Science Engineering 95 E Calle Encanto, Tucson 85716 | (520) 881-1996 |
| K B Engineering 1271 E Paseo Alegre, Tucson 85719 | (520) 292-2368 |