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Who We Are

A & O Engineering

We are a locally owned and operated civil engineering firm specializing in residential, commercial, and industrial projects. A & O Engineering was founded in 2011 and we are licensed to provide engineering services as well as site development consulting in Oregon, Washington, Arizona and Idaho. 

With more than thirty years of engineering experience, we approach every project big and small with the same expertise while offering the personal touch of a small business. 


Learn About Our Services

What We Offer

A & O Engineering processes land use applications for tentative and final partitions, subdivisions, site reviews, planned unit developments, and cluster subdivisions. We also process environmental applications including DEQ NPDES permits. Additionally, we detail engineering documents for public improvements, private building permits, step backwater analysis DEQ 1200c permits, and complete engineering analyses for wetland JPA fill permits.

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Residential Projects

Commercial Projects

Industrial Projects


Contact Us

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