Epperson, president of Media Contacts in the US, and Biosca, managing director of Media Contacts Spain, become CEO and chief operating officer respectively of the Media Planning Group-owned interactive arm. Both retain their existing roles heading up the company in their respective countries.
Epperson replaces Maria Luisa Francoli, who relinquished her role as global CEO of Media Contacts in June to become CEO of the Media Planning Global Network, also part of Havas.
Francoli said: "I am confident that Don and Ignasi will bring the vision, the passion and the leadership that we need to successfully drive our network toward our objectives. Working together, their innovation will steer Media Contacts to new height and endeavours."
Epperson, an American based in Boston, Massachusetts, joined Media Contacts in 2001, when his digital agency HookMedia was acquired by MPG.
He is an active member of the American Association of Advertising Agencies' Interactive Marketing and New Media Committee and sits on the board of , an organisation that specialises in measuring customer satisfaction.
Before founding Hook, he worked in investment and corporate banking in New York and Boston.
Biosca is Spanish and based in Barcelona. He joined MPG in 1997 in corporate development, and was promoted to vice-president responsible for product development at Media Contacts in 1999. In summer 2000, he became managing director of Media Contacts Spain.
He has a technical background and was an engineer in the development of high-speed internet networks at France Telecom in the 90s and a systems integrator consultant at Philips in Argentina.
Havas announced earlier this year that it was to restructure, splitting its businesses between three networks: Euro RSCG Worldwide, to service the group's global clients; Arnold Worldwide, as an alternative creative network offered only in local markets; and MPG, for traditional media, marketing services and data-driven interactivity.
All non-core businesses will be sold off.
If you have an opinion on this or any other issue raised on Brand Republic, join the debate in the .