| Business | Phone |
| Aadvanced Surveyors 17424 Mallard Cove Ln, Mount Vernon 98274 | (360) 422-1311 |
| Leonard Boudinot & Skodje Inc 603 S 1st St, Mount Vernon 98273 | (360) 336-5751 |
| Lervik Engineering Mount Vernon 98273 | (360) 428-4007 |
| Summit Engineers & Surveyors 2218 Old Highway 99 S Rd, Mount Vernon 98273 | (360) 416-4999 |