She joins the company today and will report to EMEA president and UK managing director Sally Ward.
The role is a new position created following Ward’s promotion to head up EMEA.
Grey has 17 years of cross-practice agency experience and most recently spent six years as a board director with Freuds in London, serving on a senior management team.
At Freuds she workied with clients including ASDA grocers, Mars, Vodafone, PepsiCo, Bupa, Department of Health and Eurostar. Prior to Freuds, Grey was a director at Weber Shandwick.
Ward said: "We are keenly focused on the rapid and strategic development of our EMEA and UK businesses. I am confident Fenella’s expertise in holistic, ideas-driven communications and history in leading large teams will serve us well as she focuses on the UK aspect of that plan."