Since 1982, Parkin Engineering has provided structural engineering design services for a variety of structures (commercial, residential, public, and industrial), bridge form travelers, and hydraulic structures. We work with owners, developers, architects, designers, and contractors, and provide engineering calculations and designs to meet applicable standards and codes. We have worked with permitting departments in dozens of jurisdictions in the Pacific Northwest and elsewhere.

Company History

In 1982, John W. Parkin started a consulting business after completing his assignment as Project Manager for post-tensioning subcontractor VSL on the I-205 Glenn Jackson Bridge, North Channel superstructure. Initially based in downtown Vancouver, Washington USA, Parkin Engineering has provided structural engineering for thousands of wood-framed, steel-framed, concrete, and masonry buildings and miscellaneous structures in the Pacific Northwest.

Parkin Engineering has assisted the bridge construction industry worldwide with design and inspection of segmental bridge form structures and lifting devices. These structures are used by heavy construction companies to lift bridge segments into place, and to build out cast-in-place sections from bridge piers. Parkin Engineering’s bridge form travelers have been used in 17 US states and 4 countries.

Since 2005, Parkin Engineering has been a subsidiary of Smith-Root, Inc. Smith-Root, a family-owned company located in Vancouver since 1972, manufactures equipment for aquatic investigations and specializes in design of electrical barriers and guidance systems for fish and other aquatic animals. Parkin Engineering has provided engineering services for Smith-Root’s hydraulic structure design process since the 1980’s.

Parkin Team


Professional engineering registration is required in each state where we perform engineering work. Our engineers are currently licensed in the Pacific Ocean states of Washington, Oregon, California, Alaska, and Hawaii, as well as British Columbia. We are licensed in several other states and have the ability to obtain licenses by comity upon client request.