MO
Mark O'Brien
Executive
Mark O’Brien is CEO of Omnicom Branding (2026), the Diversified Agency Services unit housing Interbrand, Siegel+Gale, Sterling Brands, and Wolff Olins.
Last updated Jul 3, 2026 by the ATDb Editorial Team · Connections updated Jul 3, 2026
No profile details available yet.
Connection details