Denis Pennel has held the role of managing director of Ciett since April 2005. Pennel promotes the interests of the staffing industry before international institutions, such as the European Union (EU), the International Labour Organisation (ILO), the World Bank or the OECD. Pennel published a book in 2013, Travailler pour soit (Working for oneself), which explores recent trends in the labour market. Prior to his current role, he served as corporate communications director for Manpower France (1998- 2005). He is best known for his advocacy work during the writing phase of the Agency Work Directive as well as his efforts to ensure the optimal transposition of the directive across Europe.