| Business | Phone |
| Eaton Corp 6024 Jean Rd, Lake Oswego 97035 | (503) 636-8333 |
| Hec Inc 4449 W Bay Rd, Lake Oswego 97035 | (503) 635-7200 |
| Siemens 4550 Kruse Way, Lake Oswego 97035 | (503) 635-6700 |
| Siemens Transportation Systems 300 Oswego Pointe Dr # 106, Lake Oswego 97034 | (503) 699-0071 |