25.10.20
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DH
Darrin Humber
2 Credentials
1 Issuer
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
5 April 2019
Issue Date
Expiration Date
Certification Number
30 June 2025
Caitlyn Pollihan CEO & Executive Director
Darrin Humber
#0847 ISA Certified Arborist
PR-5322A
ISA Certified Arborist ®
ISA Certified Arborist ®
April 5, 2019
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
8 September 2017
Issue Date
Expiration Date
8 September 2027
Caitlyn Pollihan CEO & Executive Director
Darrin Humber
ISA Tree Risk Assessment Qualification®
ISA Tree Risk Assessment Qualification®
September 8, 2017
International Society of Arboriculture
