The newly created senior role is intended to reflect the company's commitment to investing in its marketing activities across its European territories.
Mercier joins from Egg, where, as the director of sales and marketing and a member of the executive board since June 2003, he was responsible for devising and co-ordinating sales, marketing and product strategy across Egg's product portfolio.
At Yahoo! Europe, Mercier will be responsible for devising and driving strategy, co-ordinating marketing programmes across Europe to support both local and global business operations and identifying and implementing state-of-the-art marketing tools and techniques in order to drive online marketing excellence.