Starting in September, WPP’s media investment arm will be under new leadership.

Brian Lesser has been appointed the new global CEO of GroupM.

Lesser won’t be new to GroupM, having previously spent 10 years at WPP, including as GroupM’s CEO for North America from 2015 to 2017. He is currently CEO and chairman of data company InfoSum.

Christian Juhl, the company’s global CEO for the last five years, will be moving into a new position at WPP as the president of corporate development.