| Business | Phone |
| Camali Corp 20845 Canada Rd, Lake Forest 92630 | (949) 580-0250 |
| Associated Consulting Engineer 22762 Aspan St # 208, Lake Forest 92630 | (949) 830-6990 |
| S & S Power Engineering 26822 Vista Ter, Lake Forest 92630 | (949) 768-7100 |
| Technovare Systems Inc 20866 Parkside, Lake Forest 92630 | (949) 460-9755 |