| Business | Phone |
| Athalye Consulting Engineers 565 Union St Ne # 201, Salem 97301 | (503) 362-1208 |
| Boatwright Engineering Inc 2613 12th St Se, Salem 97302 | (503) 363-9225 |
| Donald D Pitt Engineering 1630 19th St Ne, Salem 97303 | (503) 391-2201 |
| Ling & Assoc 3000 Market St Ne # 323, Salem 97301 | (503) 363-2078 |
| Riverside Engineering Co 2015 25th St Se, Salem 97302 | (503) 581-6362 |
| Westech Engineering 3841 Fairview Industrial # 100, Salem 97302 | (503) 585-2474 |