25.10.21
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Mark L. Hockley
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 September 2022
Issue Date
Expiration Date
22 September 2027
Caitlyn Pollihan CEO & Executive Director
Mark L. Hockley
ISA Tree Risk Assessment Qualification®
ISA Tree Risk Assessment Qualification®
September 22, 2022
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
12 November 2010
Issue Date
Expiration Date
Certification Number
31 December 2025
Caitlyn Pollihan CEO & Executive Director
Mark L. Hockley
#0847 ISA Certified Arborist
PD-2040A
ISA Certified Arborist ®
ISA Certified Arborist ®
November 12, 2010
International Society of Arboriculture
