25.8.20
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Nicholas Blackwell
3 Credentials
1 Issuer
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
20 May 2024
Issue Date
Expiration Date
Certification Number
30 June 2026
Caitlyn Pollihan CEO & Executive Director
Nicholas Blackwell
WE-14684AU
ISA Certified Arborist Utility Specialist®
ISA Certified Arborist Utility Specialist®
May 20, 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
10 November 2023
Issue Date
Expiration Date
10 November 2028
Caitlyn Pollihan CEO & Executive Director
Nicholas Blackwell
ISA Tree Risk Assessment Qualification®
ISA Tree Risk Assessment Qualification®
November 10, 2023
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
8 May 2023
Issue Date
Expiration Date
Certification Number
30 June 2026
Caitlyn Pollihan CEO & Executive Director
Nicholas Blackwell
#0847 ISA Certified Arborist
WE-14684A
ISA Certified Arborist ®
ISA Certified Arborist ®
May 8, 2023
International Society of Arboriculture
