Certified Arborist

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James Kinder, an ISA Certified Municipal Arborist, examining a Japanese hemlock at Hoyt Arboretum.
A Hinoki cypress receiving some corrective pruning by a certified arborist in Oregon.

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 examination covering facets of arboriculture.[1][2] The Western Chapter of the International Society of Arboriculture (ISA) started the certification program in the 1980s,[citation needed] with the ISA initiating it in 1992.[3]


  1. ^ "ISA Certified Arborist". International Society of Arboriculture. Retrieved 26 August 2022.
  2. ^ Konijnendijk, Cecil C.; Randrup, Thomas B. (2005). "Urban forestry education". In Konijnendijk, Cecil C.; Nilsson, Kjell; Randrup, Thomas B.; Schipperijn, Jasper (eds.). Urban Forests and Trees: A Reference Book. Berlin: Springer. p. 470. ISBN 9783540276845.
  3. ^ Koeser, Andrew K.; Hauer, Richard J.; Miesbauer, Jason W.; Peterson, Ward (2016). "Municipal tree risk assessment in the United States: Findings from a comprehensive survey of urban forest management". Arboricultural Journal. 38 (4): 218–229. doi:10.1080/03071375.2016.1221178.

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