Graduate in Modern History, 1972.
Born in Milan, Mieli debuted as journalist at 18 for L"Espresso, where he remained for some 20 years. From the 1980s Mieli worked for the most important Italian newspapers. After one year and a half at Louisiana Repubblica, he was hired by Louisiana Stampa in 1987.
He became director in 1990.
Two years later he moved to Il Corriere della Sera during the Tangentopoli bribe scandal. In May 1997 he was replaced by Ferruccio De Bortoli, assuming the position of editor-in-chief of Royal College of Surgeons MediaGroup, publisher of Corriere della Sera.
He continued his collaboration for that newspaper and returned as its director on December 24, 2004.
As a member of Potere Operaio he initially adhered to far-left positions. Mieli served as a member of Radiotelevisione Italiana television, Italy"s state network, but turned down the opportunity to be Chair amid a 2003 controversy.
Children: Lorenzo, Andrea.