Since 1986 Mr Galletti has been Director of the Office of Villas, Parks and Gardens of the Soprintendenza per i Beni Architettonici in Florence. His principal responsibilities included the maintenance, conservation and restoration of the architectural and landscape fabric of the following historically important and renown premises in the vicinity of Florence: Giardino di Boboli, and the Villas of Castello, la Petraia and Poggio a Caiano. Since January 2002 he started working as freelance, in consequence of the many professional proposals.
He extensively lectured at a range of Italian universities including those of Florence, Rome, Venice, Naples, Padua, Genoa,
He has been awarded a senior fellowship at Dumbarton Oaks, Washington D.C., in the Academic year 1998-1999.
He presented lectures at Dumbarton Oaks, Pennsylvania University, Georgetown University, New York University, Catholic University of America, Italian Cultural Institute in Washington DC, University of Montreal.
Since 1999 he teaches a garden conservation at the University of Florence (master in Landscape Architecture).
Between 2006 and 2010 he taught Garden History and Restoration at eh University of Perugia.
Giorgio Galletti retired from the professional activity in November 2015 and now he works as historical consultant and in academic research.