Career
Giorgos Valerianos began playing football with Olympiacos. He is a very talented player and one of the best young players who were playing in Olympiacos U-21. He made 44 appearances for the youth team with four goals.
Valerianos was first included in Olympiacos" first team in a league match against Panthrakikos F.C. on 11 April 2010, where he appeared as a second-half substitute.
On 22 July 2014 he signed for Iraklis in the Greek Football League. Valerianos debuted for Iraklis in a cup match against Lamia.
On 12 August 2015, he signed a contract with second tier club Apollon Smyrni. On 29 January 2016, he solved his contract with the club