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GJ
Guillermo J. Barillas
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
11 December 2020
Issue Date
Expiration Date
Certification Number
31 December 2026
Caitlyn Pollihan CEO & Executive Director
Guillermo J. Barillas
#0847 ISA Certified Arborist
MI-4553A
ISA Certified Arborist ®
ISA Certified Arborist ®
December 11, 2020
International Society of Arboriculture
