25.9.12
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Suggested Credentials
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GD
Gregory Dorr
2 Credentials
1 Issuer
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
5 April 2022
Issue Date
Expiration Date
Certification Number
30 June 2025
Caitlyn Pollihan CEO & Executive Director
Gregory Dorr
NE-7118B
ISA Board Certified Master Arborist®
ISA Board Certified Master Arborist®
April 5, 2022
International Society of Arboriculture
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
1 March 2014
Issue Date
Expiration Date
1 March 2029
Caitlyn Pollihan CEO & Executive Director
Gregory Dorr
ISA Tree Risk Assessment Qualification®
ISA Tree Risk Assessment Qualification®
March 1, 2014
International Society of Arboriculture
