25.12.6
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Suggested Credentials
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Geoffrey Guthrie
3 Credentials
1 Issuer
The International Society of Arboriculture
Hereby Announces That
Has Earned the Credential
ISA Certified Arborist Utility Specialist®
By successfully meeting ISA Certified Arborist Utility Specialist certification requirements through demonstrated attainment of relevant competencies as supported by the ISA Credentialing Council
4 February 2025
Issue Date
Expiration Date
Certification Number
31 December 2026
Caitlyn Pollihan CEO & Executive Director
Geoffrey Guthrie
WE-13185AU
ISA Certified Arborist Utility Specialist®
ISA Certified Arborist Utility Specialist®
February 4, 2025
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
12 April 2024
Issue Date
Expiration Date
12 April 2029
Caitlyn Pollihan CEO & Executive Director
Geoffrey Guthrie
ISA Tree Risk Assessment Qualification®
ISA Tree Risk Assessment Qualification®
April 12, 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
14 October 2020
Issue Date
Expiration Date
Certification Number
31 December 2026
Caitlyn Pollihan CEO & Executive Director
Geoffrey Guthrie
#0847 ISA Certified Arborist
WE-13185A
ISA Certified Arborist ®
ISA Certified Arborist ®
October 14, 2020
International Society of Arboriculture
