He became the president in 1984, a post he retained after the merger with Eurocom in 1992.
He later became the vice-president of Havas in 1997.
He left Havas in 2005.
A member of the directors' committee of Paris Saint-Germain since 1986, he became a minority shareholder (2%) from 1991 to 2005, then the president in June 2006.
He resigned in April 2008 after the club suffered poor results, escaping relegation on the last day of the 2007-2008 football season.