25.14.6
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Nicholas A. Willis
1 Credential
1 Issuer
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 April 2011
Issue Date
Expiration Date
Certification Number
30 June 2026
Caitlyn Pollihan CEO & Executive Director
Nicholas A. Willis
#0847 ISA Certified Arborist
IL-5364A
ISA Certified Arborist ®
ISA Certified Arborist ®
April 12, 2011
International Society of Arboriculture
