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Verify an ISA Certification / Find a Tree Care Service

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HOW TO USE THE SEARCH OPTIONS: This is a method for verifying someone is an ISA certification holder and/or finding and arborist is for hire and offers a particular tree care service.

Select one of the four search methods; by location, by last name, by certificaiton ID or by postal code. Then complete the form and press the 'Search Now' button.

Searching by zip/postal code may result in a broader result than searching by city and/or state. Searching by city and/or state only returns results that exactly match your criteria. Searching by United States zip code will return at least 30 records, looking outside the target zip/postal code you entered if necessary. Searching by a non-United States Postal code will only return records for that exact Postal Code. PLEASE NOTE! If the person you are searching for has moved and has not notified ISA or updated the information in our search database, you may not get search results.

If you are a certified arborist and have a ISA username and password you may update your information in the Verify A Certified Arborist database by clicking here.


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"I never saw a discontented tree. They grip the ground as though they liked it, and though fast rooted they travel about as far as we do. They go wandering forth in all directions with every wind, going and coming like ourselves, traveling with us around the sun two million miles a day, and through space heaven knows how fast and far!" - John Muir


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© International Society of Arboriculture 2009
P.O. Box 3129, Champaign, IL 61826
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