| Business | Phone |
| Clayton Engineering & Consult 3444 N Country Club Rd # 120, Tucson 85716 | (520) 326-0770 |
| Glhn Architects & Engineers 2939 E Broadway Blvd, Tucson 85716 | (520) 881-4546 |
| Professional Engineering 4500 E Speedway Blvd # 20, Tucson 85712 | (520) 881-1711 |
| Light Mechanics 801 N Shepherd Hls, Tucson 85710 | (520) 296-5146 |