Brian Lesser Returns as Global CEO of GroupM

Lesser to focus on advancing technology and addressing recent client losses at WPP's media investment company.

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.