25.10.2
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WD
William Davis Walker
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
9 March 2021
Issue Date
Expiration Date
Certification Number
30 June 2027
Caitlyn Pollihan CEO & Executive Director
William Davis Walker
#0847 ISA Certified Arborist
MA-6373A
ISA Certified Arborist ®
ISA Certified Arborist ®
March 9, 2021
International Society of Arboriculture
