| Business | Phone |
| Electro-Test Inc 9825 Carroll Centre Rd # 300, San Diego 92126 | (858) 695-9551 |
| Power Systems Testing Co 8515 Arjons Dr # D, San Diego 92126 | (858) 536-9051 |
| Cubic Defence Systems Inc 9233 Balboa Ave, San Diego 92123 | (858) 277-6780 |
| Electrical Reliability Svc 9825 Carroll Centre Rd # 300, San Diego 92126 | (858) 695-9551 |