25.12.4
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MJ
Michael John Duff
1 Credential
COLUMBIA BUSINESS SCHOOL EXECUTIVE EDUCATION
hereby recognizes that
MICHAEL DUFF
has attended and completed
COLUMBIA MANAGEMENT ESSENTIALS (ONLINE)
JULY 2020
Pierre Yared
Vice Dean, Executive Education Columbia Business School
COLUMBIA MANAGEMENT ESSENTIALS (ONLINE)
August 7, 2020
Emeritus
1 more credential
1 more issuer
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