Johnston Engineering Johnston Engineering Search | Advanced Search | New Members | Coupons and Discounts | All Categories   Business & Professional Services >> Professional Services >> Engineering Services Johnston Engineering 1815 E Trent AveSpokane, WA 99202 | View on Google Maps (509) 290-1034 Visit Site Connect With Us Member Since: 2017 Send a message to: Johnston Engineering Your Name: Your Email: Subject: Message: (Date: 12/30/2024)