25.10.5
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GZ
Gavin Zirbel
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
23 August 2024
Issue Date
Expiration Date
23 August 2029
Caitlyn Pollihan CEO & Executive Director
Gavin Zirbel
ISA Tree Risk Assessment Qualification®
ISA Tree Risk Assessment Qualification®
August 23, 2024
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
6 November 2023
Issue Date
Expiration Date
Certification Number
31 December 2026
Caitlyn Pollihan CEO & Executive Director
Gavin Zirbel
#0847 ISA Certified Arborist
WE-15009A
ISA Certified Arborist ®
ISA Certified Arborist ®
November 6, 2023
International Society of Arboriculture
