Along with Reihner Behrens, the chief executive officer of the group, she will take managerial responsibility for all of the businesses within the company, including Burnett, Starcom and Red Nail.
In her new role, she will continue to play a significant role in the running of the agency, as well as overseeing broader management issues for the group.
Burnett will now be run by Rainer Pabst, the current client services director, who will become the managing director.