Stéphane was named CEO, Euro RSCG France in 2003, then Executive Co-Chairman in 2005. In 2011, he became Vice-President of Havas Group. Stéphane is also an international political advisor, having advised Polish President Aleksander Kwa?niewski (1995 - 2005) and Israeli Prime Minister Ehud Barak. He has also worked for the French Socialist Party. Stéphane is a noted lecturer, having spoken at the French-American Foundation, Princeton University, and during the Young Leaders convention in New York. He has experience across a wide range of sectors and professions, including politics, economics, media, advertising, marketing, and advising, and has worked with such clients as Airbus, BNP Paribas, LVMH, Alcatel, Cap Gemini, and Microsoft.

Stéphane holds a master’s degree in public law from University Paris I Pantheon-Sorbonne, a DESS (degree awarded after a five-year course of study) in Political and Social Communication from Paris I, and has studied political science at the IEP. He is the author of a book published by Plon in 2007, entitled "Les Nouvelles Elites". The book addresses the new elites who are coming into power in France: Who are they? What do they think about their country? What do they want to change? And, especially, what are they going to change? Since 2009 he has been Administrator for the IMAGINE Foundation and for IRIS, and is on the Board of Directors of Médecins Sans Frontières (MSF). Stéphane was appointed Chevalier de l’Ordre National du Mérite in 2005, and Chevalier de la Légion d'honneur in 2008.