Dr. Antonios Hatziefremidis received his degree in Electrical and Computer Engineering from the National Technical University of Athens in 1995 and his PhD in Optical Telecommunications from the Electrical and Computer Engineering department from the National Technical University of Athens in 1999. During and after his PhD, he was basic member of the Photonic Communications Research Laboratory, where he worked in the fields of optical amplifiers, lasers, optical sources, optical switching and networks. In 2001 he joined the Hellenic Aerospace Industry in the Research & Development department and then in the Satellite Communications and Applications Department, where he worked as Director for four years, developing fixed and mobile satellite systems for the Hellenic Armed Forces, having also the responsibility of many important projects. Since 2008 he was an Associate Professor in the Department of Aircraft Technology at Technological Educational Institute of Central Greece and since 2019 he is a Professor in the Department of Aerospace Science and Technology of the National and Kapodistrian University of Athens, in the field of Aeronautical Telecommunications. He has been involved in various research projects being funded from National and European resources. His research interests include the design and development of optical logic devices, photonic signal processing subsystems for optical networks, OTDM / DWDM high-speed optical sources, wireless optical communications, satellite applications, telecommunications and unmanned aerial vehicles. His research has been published in more than forty journals and conference proceedings and it is internationally recognized by the research community. His teaching interests include Signal and Systems, Telecommunications, Optical and network communication systems, Aircraft systems, Aircraft antennas and Aircraft navigation systems. Up to date, twenty-five undergraduate thesis have been successfully completed and more the eighteen are in progress and under his supervision, mainly in the field of optical communications, telecommunications, wireless communications, airline simulation systems, satellite communication, Software Defined Radio (SDR) technologies and unmanned aerial vehicles.