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RE
Ronald E. Rothhaas
2 Credentials
1 Issuer
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
20 February 2017
Issue Date
Expiration Date
Certification Number
30 June 2026
Caitlyn Pollihan CEO & Executive Director
Ronald E. Rothhaas
OH-5177B
ISA Board Certified Master Arborist®
ISA Board Certified Master Arborist®
February 20, 2017
International Society of Arboriculture
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
1 February 2013
Issue Date
Expiration Date
20 April 2026
Caitlyn Pollihan CEO & Executive Director
Ronald E. Rothhaas
ISA Tree Risk Assessment Qualification®
ISA Tree Risk Assessment Qualification®
February 1, 2013
International Society of Arboriculture
