| Business | Phone |
| C & O Svc Inc 2236 Nw Nicolai St, Portland 97210 | (503) 295-2032 |
| Fire Protection Engineering 6855 W Clearwater Ave # H, Portland 97204 | (503) 221-3788 |
| Lockwood Engineering 10149 Sw Barbur Blvd, Portland 97219 | (503) 546-0628 |
| Fire Protection Consulting 3115 Nw 132nd Pl, Portland 97229 | (503) 531-8717 |