| Business | Phone |
| Electrical Designs Assoc Inc 8384 Baymeadows Rd, Jacksonville 32256 | (904) 739-0707 |
| Haddad Engineering Inc 2955 Hartley Rd # 205, Jacksonville 32257 | (904) 262-5066 |
| M & T Co 6196 Lake Gray Blvd # 114, Jacksonville 32244 | (904) 771-6321 |
| Lea Engineering & Assoc Inc 4427 Emerson St # 5, Jacksonville 32207 | (904) 399-3499 |
| John Searcy & Assoc Inc 2700 University Blvd W # B4, Jacksonville 32217 | (904) 739-1231 |