| Business | Phone |
| Associated Engineering Inc 11410 N Cave Creek Rd, Phoenix 85020 | (602) 274-8988 |
| C A Energy Designs 1247 E Eugie Ave, Phoenix 85022 | (602) 864-3000 |
| D L Engineering & Controls Inc 3550 N Central Ave, Phoenix 85012 | (602) 266-4658 |
| Darcor & Assoc 11811 N Tatum Blvd # 2530, Phoenix 85028 | (602) 787-6460 |
| N P Engineering Inc 4115 N 15th Ave, Phoenix 85015 | (602) 265-1559 |
| Edi Electrical Design Inc 4045 E Mcdowell Rd # B, Phoenix 85008 | (602) 275-4365 |
| Energy Systems Designs 4747 N 22nd St # 300, Phoenix 85016 | (602) 957-8333 |
| Industrial Power Engrg Corp 4636 E University Dr, Phoenix 85034 | (480) 784-2700 |
| Haberman Electrical 115 W Mcdowell Rd, Phoenix 85003 | (602) 258-6936 |