25.10.5
This website uses cookies to ensure you get the best experience on our website.
Learn more
Got it!
Skip to main content
Suggested Credentials
Sign in
JT
Jonathan Tyler Walker
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
1 December 2023
Issue Date
Expiration Date
Certification Number
31 December 2027
Caitlyn Pollihan CEO & Executive Director
Jonathan Tyler Walker
WE-12382AU
ISA Certified Arborist Utility Specialist®
ISA Certified Arborist Utility Specialist®
December 1, 2023
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
11 November 2020
Issue Date
Expiration Date
11 November 2025
Caitlyn Pollihan CEO & Executive Director
Jonathan Tyler Walker
ISA Tree Risk Assessment Qualification®
ISA Tree Risk Assessment Qualification®
November 11, 2020
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 November 2018
Issue Date
Expiration Date
Certification Number
31 December 2027
Caitlyn Pollihan CEO & Executive Director
Jonathan Tyler Walker
#0847 ISA Certified Arborist
WE-12382A
ISA Certified Arborist ®
ISA Certified Arborist ®
November 14, 2018
International Society of Arboriculture
