Bertrand Le Guern graduated from ESTACA Ecole d'Ingénieurs in Paris in 1991 with the title of engineer of aviation, aeronautics major. In the years 1991-1994 he worked as Quality Engineer in Aerospatiale in Tarbes, near Toulouse, and as a project leader in WSK PZL Mielec. In the years 1994-1998 he held the function of the Technical Vice President of the Management Board of PTK Centertel, and in the years 2000-2004 he was the Vice President of the Management Board of Telekomunikacja Polska S.A., responsible for the reorganization of the company.Simultaneously, in the years 2001-2004, he held the function of the Chairman of the Supervisory Board of TP Internet, a company of the TP Group, and in the years 2002-2004 he was Vice Chairman of the Polish Confederation of Private Employers. From May to December 2004, he held the function of the Restructuring Director at France Telecom in Paris. In 2005, he took the post of the Chief Executive Officer in Alma SA. From March 2007, he held the function of a Member of the Management Board and the Chief Operations Director in Netia S.A. From December 2008 to June 2010, he was the President of the Management Board of Canal+ Cyfrowy.From 30 June 2010 to 9 September 2010 he was a member of the Supervisory Board of Petrolinvest SA. Since July 2010 he has been a partner of the Values company, and since April 2010 the President of French Chamber of Commerce and Industry. He is also a member of the Supervisory Board of Silurian Sp. z o. o. He has been President of the Management Board of Petrolinvest since September 2010.