Mr. Mazarakis, 47 years old, has 20 years of professional experience, chiefly in senior management positions in Greece and abroad. Before joining OTE Group, on July 1st, 2012, as OTE Group Chief Financial Officer, Mr Mazarakis was Group Chief Financial Officer (CFO) of the National Bank of Greece, which is listed on the Athens and New York Stock Exchanges and from 2008 until 2010 he was Group Chief Financial Officer (CFO) and Member of the Group Executive Committee of TITAN Cement Company, which is listed on the Athens Stock Exchange.

From 1999 to 2008 Mr Mazarakis served in various executive positions in Vodafone Group. Initially, he was Group CFO and Member of the BoD in Greece (1999-2006), then Chief Executive Officer (CEO) in Hungary (2006-2007) and in 2007 he returned to Greece as COO and Vice-Chairman of the BoD. During the period 1997-1999 he held the position of Finance Director and Member of the BoD at Georgia Pacific-Delica in Greece, while from 1992 until 1997 he worked as Financial Analysis Group Manager at Procter & Gamble, first in Athens and then in the European Headquarters in Brussels. Mr Mazarakis holds a Bachelor's degree in Business Administration from the University of Piraeus (with distinction) and an MBA from the Ohio State University, The Fischer School of Business (with Wielder Scholar), where he was Teaching Assistant in Finance. He has been listed among the 30 most distinguished CFOs in Europe below 40 years old (2002, CFO Europe magazine).