25.9.12
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Suggested Credentials
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GZ
Gerard Zeller
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
21 June 2023
Issue Date
Expiration Date
21 June 2028
Caitlyn Pollihan CEO & Executive Director
Gerard Zeller
ISA Tree Risk Assessment Qualification®
ISA Tree Risk Assessment Qualification®
June 21, 2023
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
9 December 2022
Issue Date
Expiration Date
Certification Number
31 December 2025
Caitlyn Pollihan CEO & Executive Director
Gerard Zeller
#0847 ISA Certified Arborist
MA-6610A
ISA Certified Arborist ®
ISA Certified Arborist ®
December 9, 2022
International Society of Arboriculture
