25.12.14
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MD
Mark D. Lyon
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
19 September 1997
Issue Date
Expiration Date
Certification Number
30 June 2027
Caitlyn Pollihan CEO & Executive Director
Mark D. Lyon
#0847 ISA Certified Arborist
WE-3104A
ISA Certified Arborist ®
ISA Certified Arborist ®
September 19, 1997
International Society of Arboriculture
