25.9.12
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WM
WITZEL MARDI
2 Credentials
Columbia Business School Executive Education
hereby recognizes that
Mardi Witzel
has participated in:
June 2023
Costis Maglaras
Dean and David and Lyn Silfen Professor of Business
Finance and Accounting for the Nonfinancial Professional (Online)
Finance and Accounting for the Nonfinancial Professional (Online)
June 12, 2023
Emeritus
THIS IS TO CERTIFY THAT
HAS ATTENDED AND SUCCESSFULLY COMPLETED
MARDI WITZEL
DIGITAL MARKETING: CUSTOMER ENGAGEMENT, SOCIAL MEDIA, PLANNING & ANALYTICS
Bob Halperin
Pierre Yared
MAY 2021
Academic Director EMERITUS
Vice Dean, Executive Education Columbia Business School
DIGITAL MARKETING: CUSTOMER ENGAGEMENT, SOCIAL MEDIA, PLANNING & ANALYTICS
June 3, 2021
Emeritus
