25.13.16
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
LR
Liam Robertson
2 Credentials
1 Issuer
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
3 October 2019
Issue Date
Expiration Date
3 October 2024
Caitlyn Pollihan CEO & Executive Director
Liam Robertson
ISA Tree Risk Assessment Qualification®
ISA Tree Risk Assessment Qualification®
October 3, 2019
International Society of Arboriculture
warning
Expired
Expired credential.
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
1 April 2017
Issue Date
Expiration Date
Certification Number
30 June 2026
Caitlyn Pollihan CEO & Executive Director
Liam Robertson
#0847 ISA Certified Arborist
PN-8398A
ISA Certified Arborist ®
ISA Certified Arborist ®
April 1, 2017
International Society of Arboriculture
