| Business | Phone |
| Devco Engineering Inc 245 Ne Conifer Blvd, Corvallis 97330 | (541) 757-8991 |
| Fred Wright Consulting Eng Inc 101 Sw Western Blvd, Corvallis 97333 | (541) 753-5644 |
| Mc Gee Engineering 655 Nw Jackson Ave, Corvallis 97330 | (541) 757-1270 |
| Mss Inc 535 Sw 4th St, Corvallis 97333 | (541) 753-1320 |
| Otak Inc 435 Nw 5th St # D, Corvallis 97330 | (541) 738-1611 |
| Pillar Consulting Group 460 Sw Madison Ave # 1, Corvallis 97333 | (541) 752-9202 |