25.12.4
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RW
Ronald W. Simpson
3 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
24 September 2020
Issue Date
Expiration Date
Certification Number
31 December 2026
Caitlyn Pollihan CEO & Executive Director
Ronald W. Simpson
SO-1906B
ISA Board Certified Master Arborist®
ISA Board Certified Master Arborist®
September 24, 2020
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
30 November 2018
Issue Date
Expiration Date
30 November 2028
Caitlyn Pollihan CEO & Executive Director
Ronald W. Simpson
ISA Tree Risk Assessment Qualification®
ISA Tree Risk Assessment Qualification®
November 30, 2018
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 February 2001
Issue Date
Expiration Date
Certification Number
30 June 2022
Caitlyn Pollihan CEO & Executive Director
Ronald W. Simpson
#0847 ISA Certified Arborist
SO-1906A
ISA Certified Arborist ®
ISA Certified Arborist ®
February 17, 2001
International Society of Arboriculture
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Expired
Expired credential.
