Stefanos Plastras is currently a Ph.D. Candidate in the Department of Information and Communication Systems Engineering at the University of the Aegean, Greece. His scientific interests include radio resource allocation for integrated Terrestrial and Non-Terrestrial Networks (TN-NTN), with a strong focus on Quality of Service (QoS) optimization using Artificial Intelligence (AI), Machine Learning (ML), and optimization algorithms. Also, his research focuses on advanced architectures for Beyond 5G (B5G) and 6G networks, with particular emphasis on 6G Core Network design, B5G API development, core network openness and exposure, standardization, and intelligent networking methodologies. Previously, he worked as a Research Associate at the FRONT Research Group of the Institute of Informatics and Telecommunications (IIT), National Centre for Scientific Research "Demokritos" (NCSRD), Greece. During his time at NCSRD, he contributed to the design and development of advanced B5G and 6G networking solutions through European Space Agency (ESA) and EU-funded HORIZON (SNS-JU, Cluster 4) projects. His responsibilities included project management, proposal writing, technical contributions, and the coordination and preparation of satellite communications and B5G-related research proposals. He received the M.Eng. (Integrated Master) degree in Information and Communication Systems Engineering from the University of the Aegean and the M.Sc. degree in Computer Science from the AUEB Athens.