This list of Certified Arborists for hire is provided as a public service by the International Society of Arboriculture, Pacific Northwest Chapter (PNW-ISA), a professional association of arborists in Alaska, Idaho, Oregon, Washington, and British Columbia.

Logos

• ISA logos are available for use by current members and certification credential holders to identify them as people committed to professional tree care.
• These logos are intended for individuals who meet the requirements rather than companies who employISA members and certified individuals.
• ISA members and credential holders are encouraged to use the title and wear the emblem proudly while following usage requirements as set forth by the ISA Trademark Policy.

You may wish to download a copy of the ISA Logo Guide. It provides further guidelines for the proper symbols that an ISA Certified Arborist would use to identify themselves within a community.

To use the term "Certified Arborist", an individual must have three years of experience and have passed a certification exam that tests a variety of tree care knowledge. Not all arborists are qualified to provide all arboricultural services, and Certification is no guarantee of performance. As with any service you purchase, it is best to shop around, ask for recommendations, and get written estimates.

Most Commercial Tree Care companies provide a wide range of arboriculture services, such as tree pruning, removal, fertilization, problem diagnosis, and other tree care tasks. Companies may employ any number of Certified Arborists depending on their size and the type of work they do.

This is not a complete list of Certified Arborists. Those arborists listed here have paid the PNW-ISA to advertise the fact that they offer services in these areas. While this list is organized by state/province for ease of use, many arborists cover more than one state/province. No endorsement or recommendation is granted or implied to any individual listed. A complete listing of all certified arborists is available on the Internet at: www.isa-arbor.com.

A list of Certified Arborists providing Commercial Tree Work in the Pacific Northwest (OR, WA, ID, BC, AK) available for hire can be download by CLICKING HERE. This list is updated frequently.

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For a list of Certified Arborists offering Consulting Arborist services in the Pacific Northwest, click on the "Consulting Arborists" link at the left side of this page.