Lefteris Mamatas is an Associate Professor with the Department of Applied Informatics at the University of Macedonia and a Scientific Associate at ATHENA Research Center, in Greece. In the past, he has worked as a Researcher at University College London in the United Kingdom, the Democritus University of Thrace in Greece, and DoCoMo Eurolabs in Germany. He has also been involved in numerous international research projects, including CODECO (Horizon Europe), NEPHELE (Horizon Europe), NECOS (H2020), FED4FIRE+ OC4 (H2020), WiSHFUL OC2 (H2020), MONROE OC2 (H2020), and Extending Internet into Space (ESA). He has authored over 80 articles in international journals and conferences, focusing on areas such as Software-Defined Networks, the Internet of Things, Cloud Computing and 5G/6G Networks.