25.12.11
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DS
David S. Vandergriff
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
7 November 2014
Issue Date
Expiration Date
7 November 2029
Caitlyn Pollihan CEO & Executive Director
David S. Vandergriff
ISA Tree Risk Assessment Qualification®
ISA Tree Risk Assessment Qualification®
November 7, 2014
International Society of Arboriculture
The International Society of Arboriculture
Hereby Announces That
Has Earned the Credential
ISA Board Certified Master Arborist®
By successfully meeting ISA Board Certified Master Arborist certification requirements through demonstrated attainment of relevant competencies as supported by the ISA Credentialing Council
19 March 2013
Issue Date
Expiration Date
Certification Number
30 June 2025
Caitlyn Pollihan CEO & Executive Director
David S. Vandergriff
SO-0846B
ISA Board Certified Master Arborist®
ISA Board Certified Master Arborist®
March 19, 2013
International Society of Arboriculture
