Presently, Didier Casas is General Counsel at Bouygues SA and Deputy MD-Human Resources & Communications at Bouygues Telecom SA (a subsidiary of Bouygues SA). Mr. Casas is also on the board of Société Nationale SNCF.

In his past career Mr. Casas held the position of Chairman for Bouygues Telecom Foundation, General Counsel for Télévision Française 1 SA, Secretary General at Dexia Crédit Local SA, Chairman of Fédération Française des Télécoms, Chairman for Fédération Française des Télécoms and Associate Professor at the University of Poitiers.

Mr. Casas received a graduate degree from Sciences Po and an undergraduate degree and a graduate degree from the University of Grenoble.