25.14.29
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Duncan Keller
2 Credentials
1 Issuer
The International Society of Arboriculture
Hereby Announces That
Duncan Keller
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
31 January 2030
31 January 2025
Expiration Date
Issue Date
ISA Tree Risk Assessment Qualification®
ISA Tree Risk Assessment Qualification®
January 31, 2025
International Society of Arboriculture
The International Society of Arboriculture
Hereby Announces That
Duncan Keller
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 2027
24 August 2024
WE-15539A
Expiration Date
Certification Number
Issue Date
#0847 ISA Certified Arborist
ISA Certified Arborist ®
ISA Certified Arborist ®
August 24, 2024
International Society of Arboriculture
