25.13.10
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Matthew Lehtonen
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
18 September 2019
Issue Date
Expiration Date
18 September 2029
Caitlyn Pollihan CEO & Executive Director
Matthew Lehtonen
ISA Tree Risk Assessment Qualification®
ISA Tree Risk Assessment Qualification®
September 18, 2019
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
28 March 2019
Issue Date
Expiration Date
Certification Number
30 June 2025
Caitlyn Pollihan CEO & Executive Director
Matthew Lehtonen
#0847 ISA Certified Arborist
MA-6158A
ISA Certified Arborist ®
ISA Certified Arborist ®
March 28, 2019
International Society of Arboriculture
