The agency has also promoted its deputy managing director, Mike Larmer, to the post of managing director. Larmer will take operational responsibility for the agency with the chief executive, Adam Coleman, focusing on future growth.
WWAV is abandoning its silo structure of departments to replace it with four client groups.
The agency has so far hired three managing partners, Sarah Bryan, Paul Alexander and Neil Davidson, to take responsibility for each client group.
Coleman said: "Clients are asking for a quicker way to market. They want access to the right people in a seamless way. At the moment we have a scale and depth of resource but increasingly competition is coming not just from large operations but smaller agencies whose quick responsiveness we have to match."