| Business | Phone |
| Charles R Settles Co 2020 W Airport Rd # 6, Stillwater 74075 | (405) 377-8203 |
| Hydrologic Inc 2323 W 7th Ave, Stillwater 74074 | (405) 624-0289 |
| Lakeshore Engineering Svc Inc 205 W 7th Ave # 203b, Stillwater 74074 | (405) 707-0100 |
| Ren Corp 5900 S Perkins Rd, Stillwater 74074 | (405) 377-5406 |
| Wayne Engineering Svc 1502 N Skyline St, Stillwater 74075 | (405) 372-5454 |
| Young Cline Consulting Engnr 6610 W Devonshire Rd, Stillwater 74074 | (405) 377-2310 |