Director for Public Sector Transformation / 

Délégué interministériel à la transformation publique, France

Academic background:

  • Special Military Academy of Saint-Cyr, Master in International Relations (1993);
  • University of Paris 2 Panthéon-Assas, Master in Public Administration and Management (1998).

Professional background:

  • Gendarmerie Officer (1993-1998);
  • Deputy Head of the office for “Higher Education, Youth and Sport” in the Budget Directorate (1998-2002);
  • Inspector of Finances (2002-2005);
  • Deputy to the Head of Service of the Inspectorate-General of Finances (2005-2007) ;
  • Career within the Saint-Gobain Group: Director of Internal Audit and Control (2007-2008); Executive Director of the Timber Group (2009-2011); Deputy General Delegate, United Kingdom, Ireland and South Africa (2009-2011); Managing Director of Saint-Gobain Construction Products, Nordic and Baltic Regions (2011-2018); General Delegate for the Nordic and Baltic Regions (2012-2019);
  • Interministerial Delegate and Director for Public Sector Transformation (appointment by decree of 27 November 2019).

A graduate of the Special Military Academy of Saint-Cyr and the University of Paris 2 Panthéon-Assas, Thierry Lambert became Inspector of Finances in 2002, after four years in the Budget Directorate at the Ministry for Economy. He then joined Saint-Gobain group in 2007, where he headed various departments, particularly those related to the group’s foreign activities in the Anglo-Saxon, Baltic and Nordic countries. Thierry Lambert was appointed Director for Public Sector Transformation by decree in November 2019.


Reporting to the Minister of Public Transformation and Civil Service, the Interministerial Directorate for Public Sector Transformation (in French, Direction Interministérielle de la Transformation Publique, DITP) provides its expertise and resources for the transformation of public action. It brings together more than 80 experts, consultants and researchers to support public stakeholders in the implementation of their projects.

The objective is to build closer, simpler and more effective public services for French citizens, involving public agents.

Convinced that the user must be placed at the heart of public action, the DITP supports public stakeholders in the design of user-centric public policies. The aim is to strengthen the impact of these policies in the daily lives of French citizens. The DITP is also leading the implementation of a continuous improvement approach of public services, involving users, staff and administrations.

This new approach gives full meaning to public action and the commitment of public servants. To enable “public energy”, the DITP is also driving the internal transformation of the State. Its credo: to promote user-centric organisations, to value and give agents autonomy, and to work differently in a symmetry of agents/users’ attentions.