De Giorgio was born in
Milan and attended Carlo Pisacane School. Between 1969 and 1970, he was the Chairman of the Board of Governors of
MCAST. Among many other buildings, in
Malta, Mortimer and de Giorgio Architects designed and built the
Sea Malta Building in 1948 and the Seminary at Tal-Virtù, completed in 1954, Mortimer and de Giorgio had offices in
Benghazi and
Tripoli where they designed and built schools and hospitals.
Isabelle Barratt-Delia, the first recorded Maltese female architect, who graduated in November 1961, worked at Mortimer and de Giorgio Architects. De Giorgio was responsible for the restoration of a number of architecturally significant buildings in
Valletta such as parts of
St John's Co-Cathedral, the Archbishop's Palace and
Saint John's Cavalier. In 1957, de Giorgio joined the
Order of Malta as a Donat of Devotion. He rose in rankings to become a Knight Grand Cross of Magistral Grace in Obedience with Sash. de Giorgio was the President of the Maltese Association of the Sovereign Military Order of Malta for 14 years between 1986 and 2000, during which time, among various projects undertaken he led the construction of the Malta Association's Headquarters at Casa Lanfreducci in Valletta. De Giorgio also led the organising committee for the celebrations held in Malta to mark the 900th anniversary of the foundation of the order. De Giorgio died on 5 February 2016 in Malta. == Personal life ==