GroupM North America CEO Brian Lesser leaves agency for AT&T

Brian Lesser was one of the architects of GroupM's adtech arm Xaxis

Brian Lesser is leaving his position as chief executive of GroupM North America to take on a role at AT&T.

Kelly Clark, global chief executive of WPP’s GroupM, will take on his responsibilities while the company searches for a replacement.

Lesser took on the role of GroupM North America chief executive two years ago. He’d previously served as global chief executive of Xaxis.

“Brian has been a key contributor to 24/7, Xaxis and most recently GroupM, and we are sorry to see him go, but wish him every success in his new role,” GroupM said in a statement.

According to the Wall Street Journal, Lesser will be tasked with “building an advertising and analytics business using the company’s customer data and content assets” at AT&T.

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