| Business | Phone |
| Collord Engineering 6580 Red Knot St, Carlsbad 92011 | (760) 505-7788 |
| Dan Kline Engineering Po Box 130096, Carlsbad 92013 | (760) 431-9941 |
| Ocean Sytems Engineering Co 2141 Palomar Airport Rd, Carlsbad 92011 | (760) 472-0025 |
| Kimley Horn & Assoc 701 Palomar Airport Rd # 100, Carlsbad 92011 | (760) 602-7803 |