25.13.16
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MW
Michael Wiekhorst
6 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
28 October 2024
Issue Date
Expiration Date
Certification Number
31 December 2027
Caitlyn Pollihan CEO & Executive Director
Michael Wiekhorst
MW-6307BUTM
ISA Board Certified Master Arborist®
ISA Board Certified Master Arborist®
October 28, 2024
International Society of Arboriculture
The International Society of Arboriculture
Hereby Announces That
Has Earned the Credential
ISA Certified Tree Climber
By successfully meeting ISA Certified Tree Climber certification requirements through demonstrated attainment of relevant competencies as supported by the ISA Credentialing Council
10 October 2024
Issue Date
Expiration Date
Certification Number
31 December 2027
Caitlyn Pollihan CEO & Executive Director
Michael Wiekhorst
MW-6307AUTM
ISA Certified Tree Climber
ISA Certified Tree Climber
October 10, 2024
International Society of Arboriculture
The International Society of Arboriculture
Hereby Announces That
Has Earned the Credential
ISA Certified Urban Forest Professional
By successfully meeting ISA Certified Urban Forest Professional certification requirements through demonstrated attainment of relevant competencies as supported by the ISA Credentialing Council
18 September 2024
Issue Date
Expiration Date
Certification Number
31 December 2025
Caitlyn Pollihan CEO & Executive Director
Michael Wiekhorst
MW-6307AUM
ISA Certified Urban Forest Professional
ISA Certified Urban Forest Professional
September 18, 2024
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
29 August 2024
Issue Date
Expiration Date
29 August 2029
Caitlyn Pollihan CEO & Executive Director
Michael Wiekhorst
ISA Tree Risk Assessment Qualification®
ISA Tree Risk Assessment Qualification®
August 29, 2024
International Society of Arboriculture
The International Society of Arboriculture
Hereby Announces That
Has Earned the Credential
ISA Certified Arborist Utility Specialist®
By successfully meeting ISA Certified Arborist Utility Specialist certification requirements through demonstrated attainment of relevant competencies as supported by the ISA Credentialing Council
29 July 2024
Issue Date
Expiration Date
Certification Number
31 December 2025
Caitlyn Pollihan CEO & Executive Director
Michael Wiekhorst
MW-6307AU
ISA Certified Arborist Utility Specialist®
ISA Certified Arborist Utility Specialist®
July 29, 2024
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
5 December 2022
Issue Date
Expiration Date
Certification Number
31 December 2025
Caitlyn Pollihan CEO & Executive Director
Michael Wiekhorst
#0847 ISA Certified Arborist
MW-6307A
ISA Certified Arborist ®
ISA Certified Arborist ®
December 5, 2022
International Society of Arboriculture
