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Suggested Credentials
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Don L. Picker
4 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
1 February 2013
Issue Date
Expiration Date
2 March 2028
Caitlyn Pollihan CEO & Executive Director
Don L. Picker
ISA Tree Risk Assessment Qualification®
ISA Tree Risk Assessment Qualification®
February 1, 2013
International Society of Arboriculture
The International Society of Arboriculture
Hereby Announces That
Has Earned the Credential
ISA Certified Arborist Utility Specialist®
By successfully meeting ISA Certified Arborist Utility Specialist certification requirements through demonstrated attainment of relevant competencies as supported by the ISA Credentialing Council
30 January 2007
Issue Date
Expiration Date
Certification Number
31 December 2027
Caitlyn Pollihan CEO & Executive Director
Don L. Picker
IL-1619AUT
ISA Certified Arborist Utility Specialist®
ISA Certified Arborist Utility Specialist®
January 30, 2007
International Society of Arboriculture
The International Society of Arboriculture
Hereby Announces That
Has Earned the Credential
ISA Certified Tree Climber
By successfully meeting ISA Certified Tree Climber certification requirements through demonstrated attainment of relevant competencies as supported by the ISA Credentialing Council
24 May 2003
Issue Date
Expiration Date
Certification Number
30 June 2027
Caitlyn Pollihan CEO & Executive Director
Don L. Picker
IL-1619AUT
ISA Certified Tree Climber
ISA Certified Tree Climber
May 24, 2003
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
14 December 2000
Issue Date
Expiration Date
Certification Number
31 December 2027
Caitlyn Pollihan CEO & Executive Director
Don L. Picker
#0847 ISA Certified Arborist
IL-1619AUT
ISA Certified Arborist ®
ISA Certified Arborist ®
December 14, 2000
International Society of Arboriculture
