John D. Wren
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John D. Wren is President and Chief Executive Officer of Omnicom, a position he has held since January 1997. Prior to 1997, he served as President of Omnicom.
John D. Wren is President and Chief Executive Officer of Omnicom, a position he has held since January 1997. Prior to 1997, he served as President of Omnicom.