Roberto Nardi gained a degree in archaeology from the University of Rome in 1982, and in 1981 a diploma in conservation of archaeological materials and structures from ICR - Istituto Centrale per il Restauro (now ISCR - Istituto Superiore per la Conservazione ed il Restauro). In the same Institute he specialised in stone conservation.

In 1982 he founded the Centro di Conservazione Archeologica (CCA), a private company operating on public commission in the field of conservation of ancient monuments and archaeological sites, including professional training in conservation. He has directed over 50 projects in 10 countries, on monuments and sites such as the Arch of Septimius Severus and the Temple of Vespasian in the Roman Forum, the Roman town of Zeugma, Turkey, the mural paintings of the Madrasa Amiriya in Yemen, and the mosaics of Saint Catherine in Sinai. Roberto has carried out projects for the Getty Conservation Institute and for the Packard Humanities Institute, with special reference to mosaics conservation, and has published over 80 technical articles.

Roberto is President of the International Committee for the Conservation of Mosaics (ICCM), Fellow of the International Institute for Conservation (IIC) and member of ICOM, International Council of Museums - Committee for Conservation. He was Kress Lecturer at the American Institute of Archaeology for 2010/2011.