| Business | Phone |
| Absolute Consulting Engineers 3822 Campus Dr # 219, Newport Beach 92660 | (949) 852-8700 |
| Rst Intl 660 Newport Center Dr, Newport Beach 92660 | (949) 759-1038 |
| Advanced Professional Engineering Consultants, Inc. 3901 Westerly Place, Suite 107, Newport Beach 92660 | (949) 756-0409 |