Pierre Gadonneix (born 10 January 1943) is a French businessman; he was the chairman of the board and CEO of EDF[1] from 2004 to 2009.

Before that, he worked as Director of the Institut de Développement Industriel (IDI), the leading French investment trust specializing in SME’s.

In 1969, Pierre Gadonneix established a computer service company, called SEFI, employing around fifty engineers.

Being a member of the Board of the Fondation Nationale des Sciences Politiques (National Foundation of Political Science), Pierre Gadonneix was also a member of the Boards of major industrial groups, notably: EDF (78/87), Elf-Erap (88/95), Usinor (82/87), Renault (78/87), SNCF (83/87) and France Telecom (98/03).

Pierre Gadonneix published a Doctoral Thesis at Harvard in 1975 under the title: "An attempt to meet the US challenge in the French computer industry".