25.14.1
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Suggested Credentials
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CO
Caleb O'Brien
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
22 March 2019
Issue Date
Expiration Date
22 March 2029
Caitlyn Pollihan CEO & Executive Director
Caleb O'Brien
ISA Tree Risk Assessment Qualification®
ISA Tree Risk Assessment Qualification®
March 22, 2019
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
17 July 2013
Issue Date
Expiration Date
Certification Number
31 December 2025
Caitlyn Pollihan CEO & Executive Director
Caleb O'Brien
#0847 ISA Certified Arborist
UT-4450A
ISA Certified Arborist ®
ISA Certified Arborist ®
July 17, 2013
International Society of Arboriculture
