Thierry Mallet, born 4 September, 1960, is a graduate of Ecole Polytechnique (1980), and Ecole Nationale des Ponts et Chaussées (1985) and also holds a Master of Sciences degree from the Massachussetts Institute of Technology.

He began his career working for the French Ministry of Transport between 1987 and 1989, and then moved to the Générale des Eaux Group, where he held various positions, primarily as Head of the water activities in Spain between 1995 and 1997, and in North America between 1997 and 1999. Thierry joined Degrémont as Executive Vice- President in 2002, working closely with Jean-Louis Chaussade, who was the company’s Chairman and Chief Executive Officer at that time, before becoming Chief Executive Officer in June 2004, a position that he held until October 2009, when he became Chairman. On 1 October 2009, Thierry Mallet was appointed as Executive Vice President in charge of International Operations. Since 15 April 2013, Thierry Mallet is Executive Vice President of Innovation and Business Performance for SUEZ.