| Business | Phone |
| Alliance Engineering Group Inc 22975 Ashwood, Lake Forest 92630 | (949) 859-2450 |
| Automotive Technology Group 26571 Normandale Dr # 23g, Lake Forest 92630 | (949) 916-8640 |
| Global Engineering 25422 Trabuco Rd # 283, Lake Forest 92630 | (949) 206-8575 |
| Hdr Engineering Inc 26250 Enterprise Ct # 150, Lake Forest 92630 | (949) 454-4800 |
| Section & Motorwerks 20371 Lake Forest Dr # A3, Lake Forest 92630 | (949) 916-3102 |
| Next Step Design Inc 26170 Enterprise Way, Lake Forest 92630 | (949) 215-3339 |