Mr. Nikolaos Papachristou is a Certified Electrical Engineer at the Department of Electrical and Computer Engineering of the National Technical University of Athens (NTUA) and a member of the Technical Chamber of Greece (TEE). He has extensive experience in telecommunication design and installation projects and in the development and validation of 4G / 5G mobile applications and services, focusing inter alia on Network Functions Virtualization (NFV), Software-Defined Networking (SDN) applications, integration of cognitive features as well as testing and certification in the Cloud environment. He has also been involved as an expert researcher in the implementation of European funded research programs from 2006 to date, including collaboration with various institutes, such as the University of Athens and EKEFE “DEMOKRITOS”