After Petrom was privatised in 2004, Mariana Gheorghe became a Member of the Administration Council of Petrom representing EBRD until the 15th of June 2006 when was named General Executive Director of Petrom.
După privatizarea Petrom în 2004, Mariana Gheorghe a devenit Membră a Consiliului de Administrație al Petrom ca reprezentant BERD, până la data de 15 iunie 2006, când a fost numită Director General Executiv al Petrom.