25.10.0
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Suggested Credentials
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SB
Sherrilyn Billger
2 Credentials
1 Issuer
The International Society of Arboriculture
Hereby Announces That
Has Earned the Credential
ISA Tree Risk Assessment Qualification®
By successfully meeting ISA Tree Risk Assessment Qualification requirements through demonstrated attainment of relevant competencies as supported by the ISA Credentialing Council
22 September 2022
Issue Date
Expiration Date
22 September 2027
Caitlyn Pollihan CEO & Executive Director
Sherrilyn Billger
ISA Tree Risk Assessment Qualification®
ISA Tree Risk Assessment Qualification®
September 22, 2022
International Society of Arboriculture
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
10 February 2019
Issue Date
Expiration Date
Certification Number
30 June 2025
Caitlyn Pollihan CEO & Executive Director
Sherrilyn Billger
#0847 ISA Certified Arborist
PD-2708A
ISA Certified Arborist ®
ISA Certified Arborist ®
February 10, 2019
International Society of Arboriculture
