| Business | Phone |
| Hdr-Johnson Brittain 5210 E Williams Cir # 530, Tucson 85711 | (520) 628-3636 |
| Palmer Engineers Inc 2975 N Country Club Rd, Tucson 85716 | (520) 326-4331 |
| Modi & Co 1661 N Swan Rd # 200-11, Tucson 85712 | (520) 327-1940 |
| Land Engineering Llc 3100 N Stone Ave, Tucson 85705 | (520) 623-0503 |