| Business | Phone |
| Boyle Engineering Corp 5851 Thille St # 201, Ventura 93003 | (805) 644-9704 |
| Dtr Engineering Inc 1695 Mesa Verde Ave # 100, Ventura 93003 | (805) 648-1746 |
| Integrated Design Group 1587 Morse Ave # A, Ventura 93003 | (805) 642-6525 |
| Jensen Design & Survey 4171 Market St # 4a, Ventura 93003 | (805) 654-6977 |
| Lewis Engineering 1145 E Main St, Ventura 93001 | (805) 648-1353 |
| Northeast Engineers & Consultants 1792 Tamarin Ave, Ventura 93003 | (805) 647-3733 |
| Paul Singer & Assoc 5700 Ralston St, Ventura 93003 | (805) 644-6962 |
| Potter Engineering 196 N Brookshire Ave, Ventura 93003 | (805) 320-1073 |
| Rjr Engineering Group 1956 Palma Dr, Ventura 93003 | (805) 650-5125 |
| Willdan 374 Poli St # 101, Ventura 93001 | (805) 653-6597 |
| Yce Engineers & Surveyors 1587 Morse Ave # A, Ventura 93003 | (805) 650-6995 |
| Villafana Engineering & Constr Ventura 93003 | (805) 644-3213 |
| Touchdown Engineering 4292 Casitas Pass Rd, Ventura 93001 | (805) 649-5099 |