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Suggested Credentials
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John Siefer
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
25 August 2016
Issue Date
Expiration Date
31 December 2026
Caitlyn Pollihan CEO & Executive Director
John Siefer
ISA Tree Risk Assessment Qualification®
ISA Tree Risk Assessment Qualification®
August 25, 2016
International Society of Arboriculture
The International Society of Arboriculture
Hereby Announces That
Has Earned the Credential
ISA Board Certified Master Arborist®
By successfully meeting ISA Board Certified Master Arborist certification requirements through demonstrated attainment of relevant competencies as supported by the ISA Credentialing Council
9 January 2014
Issue Date
Expiration Date
Certification Number
30 June 2026
Caitlyn Pollihan CEO & Executive Director
John Siefer
OH-5332B
ISA Board Certified Master Arborist®
ISA Board Certified Master Arborist®
January 9, 2014
International Society of Arboriculture
