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Ethan Leatherbarrow
2 Credentials
1 Issuer
The International Society of Arboriculture
Hereby Announces That
Has Earned the Credential
ISA Tree Risk Assessment Qualification®
By successfully meeting ISA Tree Risk Assessment Qualification requirements through demonstrated attainment of relevant competencies as supported by the ISA Credentialing Council
21 April 2022
Issue Date
Expiration Date
21 April 2027
Caitlyn Pollihan CEO & Executive Director
Ethan Leatherbarrow
ISA Tree Risk Assessment Qualification®
ISA Tree Risk Assessment Qualification®
April 21, 2022
International Society of Arboriculture
The International Society of Arboriculture
Hereby Announces That
Has Earned the Credential
ISA Certified Arborist ®
By successfully meeting ISA Certified Arborist certification requirements through demonstrated attainment of relevant competencies as supported by the ISA Credentialing Council
28 May 2021
Issue Date
Expiration Date
Certification Number
30 June 2027
Caitlyn Pollihan CEO & Executive Director
Ethan Leatherbarrow
#0847 ISA Certified Arborist
PD-2878A
ISA Certified Arborist ®
ISA Certified Arborist ®
May 28, 2021
International Society of Arboriculture
