25.10.20
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Johnny S. Tien
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
23 September 2015
Issue Date
Expiration Date
Certification Number
31 December 2027
Caitlyn Pollihan CEO & Executive Director
Johnny S. Tien
#0847 ISA Certified Arborist
WE-11346A
ISA Certified Arborist ®
ISA Certified Arborist ®
September 23, 2015
International Society of Arboriculture
