Sotirios Kopsinos received the Diploma degree in Electrical and Computer Engineering from Aristotle University of Thessaloniki (AUTh), Thessaloniki, Greece, in 2024. Since October 2025, he has been working as a Research Assistant with the Information Technologies Institute (ITI), Centre for Research and Technology Hellas (CERTH). He is currently pursuing the Ph.D. degree with the Department of Computer Science and Engineering, University of Ioannina (UoI), Ioannina, Greece. His research interests include game theory, probability theory, and deep reinforcement learning, with applications to cellular and reconfigurable intelligent surface (RIS)-assisted networks.