Johnston Engineering Johnston Engineering Search | Advanced Search | New Members | Coupons and Discounts | All Categories Other >> Professional Services Johnston Engineering 1815 E Trent AvenueSpokane, WA 99202 | View on Google Maps Andy Johnston (509) 290-1034 Visit Site Engineering design and analysis services. Member Since: 2022 Send a message to: Johnston Engineering Your Name: Your Email: Subject: Message: (Date: 4/6/2026)