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Kostas Mertzanis is a seasoned security professional with extensive experience in the field. Since July 2014, Kostas has been employed at ESA Security Solutions S.A., where responsibilities include overseeing security measures and protocols. Prior to this role, Kostas served as Υπεύθυνος ασφαλείας at Media Markt Hellas from September 2013 to July 2014, managing security operations. Earlier experience includes a position as Υπεύθυνος διαχείρισης καμερών at ΣΤΑΣΥ (ΑΤΤΙΚΟ ΜΕΤΡΟ) from April 2012 to September 2013, where the focus was on camera management and surveillance systems.