25.10.20
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Suggested Credentials
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Owen Lisowski
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
4 November 2022
Issue Date
Expiration Date
4 November 2027
Caitlyn Pollihan CEO & Executive Director
Owen Lisowski
ISA Tree Risk Assessment Qualification®
ISA Tree Risk Assessment Qualification®
November 4, 2022
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
12 January 2021
Issue Date
Expiration Date
Certification Number
30 June 2027
Caitlyn Pollihan CEO & Executive Director
Owen Lisowski
#0847 ISA Certified Arborist
NE-7497A
ISA Certified Arborist ®
ISA Certified Arborist ®
January 12, 2021
International Society of Arboriculture
