Konstantinos Letsios is a Mechanical Engineer with an MSc in Hydrogen Science and Technology from the University of Western Macedonia (2024). He is currently a PhD candidate at the same institution, conducting research on the integration and optimization of renewable hydrogen technologies in Power-to-X systems and energy networks. His academic and professional work focuses on hydrogen technologies, sector coupling, and the decarbonisation of energy systems. He has been involved in several EU-funded projects in the fields of clean energy and sustainability and currently serves as a junior project manager at the Cluster of Bioeconomy and Environment of Western Macedonia (CluBE).