Eileen Kiernan

Global CEO, Mediabrands at IPG Mediabrands

Eileen Kiernan is the Global CEO of Mediabrands and is responsible for the vision, strategy, and performance of the global IPG network and its 13,000 employees across 130 countries. Eileen will also maintain the role of Global CEO of award-winning Mediabrands agency, UM for the interim, including global management for top clients like American Express, BMW, Johnson & Johnson, Levi Strauss & Co., and Sony. With more than 25 years of experience spanning brand stewardship, integrated marketing, creative strategy, business development, and team leadership, Eileen brings a rich blend of purpose-driven creativity, innate curiosity, and diversity of thought to her role. Under her leadership, UM was named Campaign’s Global Media Agency of the Year in 2021 and Adweek’s U.S. Media Agency of the Year in 2020. Eileen sits on the Board of the AEF, the ANA’s Educational Foundation. Originally from Ireland, Eileen holds degrees from University College Dublin and Pace University. She lives in New Jersey with her husband, Denis, daughter, Grace, and their many four-legged friends.


  • Global CEO, Mediabrands

    Current role

  • Global CEO, UM