25.10.20
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Levi O'Brien
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
19 May 2021
Issue Date
Expiration Date
19 May 2026
Caitlyn Pollihan CEO & Executive Director
Levi O'Brien
ISA Tree Risk Assessment Qualification®
ISA Tree Risk Assessment Qualification®
May 19, 2021
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
9 December 2020
Issue Date
Expiration Date
Certification Number
31 December 2026
Caitlyn Pollihan CEO & Executive Director
Levi O'Brien
#0847 ISA Certified Arborist
NY-6500A
ISA Certified Arborist ®
ISA Certified Arborist ®
December 9, 2020
International Society of Arboriculture
