25.12.14
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DB
David Buchanan McDonald
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
7 February 2015
Issue Date
Expiration Date
Certification Number
30 June 2026
Caitlyn Pollihan CEO & Executive Director
David Buchanan McDonald
#0847 ISA Certified Arborist
PD-2397A
ISA Certified Arborist ®
ISA Certified Arborist ®
February 7, 2015
International Society of Arboriculture
