| Business | Phone |
| Integrated Aerospace Structure 2750 Raymond Ave, Signal Hill 90755 | (562) 997-9242 |
| Sjo Brien Enterprises Inc 2706 Saint Louis Ave, Signal Hill 90755 | (562) 860-6706 |
| Smiths Aerospace Mechanical 2750 Raymond Ave, Signal Hill 90755 | (562) 997-9242 |