Sébastien started his carreer in 1988 at HDM (Havas Dentsu Marsteller) where he managed clients such as L’Oréal, Crédit Agricole, Chanel, CPC ... In 1991, Eurocom, the holding company of HDM, merged with RSCG to create the largest european advertising group, and Sébastien was appointed International Media Director ; he coordinated the international clients of the Group (PSA, LVMH, France Telecom …) and participated to the creation of the worldwide join venture with Young & Rubicam : Mediapolis. Sébastien was then hired by Carat, as Client Services Director for International clients (Danone, Philips, Chanel …), where he stayed for 2 years.
In 1997, Sébastien decided to come back on the domestic market and took the position of Chief Executive Officer Zenithmedia France, and in 2002 Chief Operating Officer of the enlarged Group, ZenithOptimedia. He becomes CEO of ZenithOptimedia in december 2007 and supervise also activities for ZenithOptimedia Bénelux.
