Phone: (509) 926-1322
Civil Engineering: Licensed in WA, ID & NV
Land Surveying: Licensed in WA & ID


Simpson Engineers, Inc., established in 1946 by Clarence E. Simpson, is an independent, family-owned business located in Spokane Valley. This full-service civil engineering and land surveying company is owned and operated by Charles E. (Chuck) Simpson, P.E. & P.L.S., who joined his father’s company in the late 1960’s. Chuck and his brother, Richard L. (Dick) Simpson, P.E. & P.L.S., ran the company together after their father’s retirement in 1980 until Dick’s passing in August 2003. Chuck’s two sons have since joined the company.

Since being founded in 1946, Simpson Engineers, Inc. has performed over 16,000 separate projects in the Inland Northwest. The company has extensive experience in a wide range of project types, including engineering analysis, platting, street design engineering, water and sewer system design engineering, water district engineering, water system plans and reports, stormwater plans and reports, floodplain analyses, land surveying, construction staking, construction oversight and inspection, grant proposals, and related engineering, surveying and land development services.