Clamadieu has been the Chairman of Engie since May 2018[2] and a former chief executive officer of Solvay and member of the board of directors from May 2012 to March 2019.

He served chairman of the board and chief executive officer of Rhodia,[3] a French chemical company acquired and integrated into the Belgian group Solvay in September 2011.

[6] In April 2011, the Belgian chemical group Solvay started a tender offer on Rhodia[7] and achieved it successfully the same year in September.

[8] Since his appointment, Clamadieu led the integration of the new group and its transformation into a major player in the field of speciality chemicals and advanced materials, which combines industrial competitiveness with the quest for sustainable solutions for its clients.

Clamadieu received the title of Knight of the Legion of Honour in December 2005[19] and Officer of the national order of Merit in May 2009.