Overview

• Brian Lesser will succeed Christian Juhl as GroupM's global CEO starting in September.
• Lesser previously led GroupM North America and has extensive experience in ad-tech and media.
• GroupM has faced significant client losses, including Pfizer, Shell, and Uber, posing challenges for Lesser.
• Lesser's return is seen as a strategic move to bolster GroupM's technology and data capabilities.
• Christian Juhl will transition to a new role as president of corporate development at WPP.