ISA – Certified Arborist

The Certified Arborist credential identifies professional arborists who have a minimum of three years’ full-time experience working in the professional tree care industry and who have passed an extensive examination covering all facets of arboriculture. After the credential is awarded, to maintain it, these professionals must continue their development and adhere to an established Code of Ethics.

Dawn Thierbach, Certified Arborist – MI 3933A




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