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ZS
Zachary Spencer
7 Credentials
2 Issuers
The International Society of Arboriculture
Hereby Announces That
Zachary Spencer
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
30 June 2028
10 June 2025
PN-10400A
Expiration Date
Certification Number
Issue Date
#0847 ISA Certified Arborist
ISA Certified Arborist ®
ISA Certified Arborist ®
June 10, 2025
International Society of Arboriculture
Forest Disease Identification and Management
Forest Disease Identification and Management
December 17, 2024
UBC Extended Learning (ExL)
Online Micro-Certificate: Forest Health Management
Online Micro-Certificate: Forest Health Management
December 17, 2024
UBC Extended Learning (ExL)
Forest Insect Identification and Management
Forest Insect Identification and Management
December 3, 2024
UBC Extended Learning (ExL)
Forest Disease Biology, Ecology and Epidemiology
Forest Disease Biology, Ecology and Epidemiology
November 12, 2024
UBC Extended Learning (ExL)
Forest Insect Biology, Ecology and Population Dynamics
Forest Insect Biology, Ecology and Population Dynamics
October 29, 2024
UBC Extended Learning (ExL)
The International Society of Arboriculture
Hereby Announces That
Zachary Spencer
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
18 July 2029
18 July 2024
Expiration Date
Issue Date
ISA Tree Risk Assessment Qualification®
ISA Tree Risk Assessment Qualification®
July 18, 2024
International Society of Arboriculture
