25.14.29
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Levi O'Brien
2 Credentials
1 Issuer
The International Society of Arboriculture
Hereby Announces That
Levi O'Brien
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
Caitlyn Pollihan CEO & Executive Director
19 May 2026
19 May 2021
Expiration Date
Issue Date
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
Levi O'Brien
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
Caitlyn Pollihan CEO & Executive Director
31 December 2026
9 December 2020
NY-6500A
Expiration Date
Certification Number
Issue Date
#0847 ISA Certified Arborist
ISA Certified Arborist ®
ISA Certified Arborist ®
December 9, 2020
International Society of Arboriculture
