Born on 16 June, 1917, in Volos, Greece, Phaedon Gizikis was a career Greek army officer. In 1967 he supported the Georgios Papadopoulos' coup d'etat and received a number of senior military posts during the dictatorship that followed.
After the fall of the dictatorship in 1974, he retained his post for four months pro tempore until a new constitution could be enacted during metapolitefsi; he was then replaced by Michail Stasinopoulos.
Later he retired from the army. In 1976, a military judicial council dropped proceedings against him and 88 other former officers charged with treason and mutiny for collaborating with the former junta. . He died on Monday July 26, 1999 at the NIMTS military hospital in Athens.