Jean-Sébastien Decaux joined JCDecaux in the United Kingdom in 1998.
In 2001, following the agreement between IGP (du Chène de Vère family), Rizzoli Corriere della Sera and JCDecaux, he was appointed as CEO Street Furniture and as Sales and Marketing Director of the Italian company IGP Decaux.
In 2004, he also took over at the helm of the Belgian and Luxembourg subsidiaries. In 2010, Jean-Sébastien Decaux was appointed as CEO Southern Europe, a post created to consolidate the operations of Spain, Portugal and Italy within the same regional entity.
From 1 March 2013 to 31 December 2019, Jean-Sébastien Decaux was Chief Executive Officer Southern Europe, Belgium and Luxembourg, Chief Executive Officer Africa and Israel.
In 2019, Jean-Sébastien Decaux left the operational functions he had held within the JCDecaux Group since 1998 and his position as a member of the Executive Board of JCDecaux SA to devote himself to the philanthropic activities of the Decaux family.