Konstantinos Mathiopoulos is a Computer Science educator with more than 22 years of teaching experience in secondary education in Greece. He currently serves at the Zanneio Model Junior High School of Piraeus, where he teaches Informatics and coordinates STEAM, robotics, programming, and innovation initiatives. He holds a degree in Informatics and Telecommunications from the National and Kapodistrian University of Athens and a Master's degree in E-Learning from the University of Piraeus. He is currently a PhD candidate at the Hellenic Open University, conducting research on educators’ needs and competence-oriented STEAM implementation. His research interests include STEAM education, digital competence, educational technology, artificial intelligence in education, teacher professional development, and open-source technologies. He has participated in and coordinated numerous European projects, including eTwinning and Erasmus+ initiatives, and has presented his work at national and international conferences. He also serves as a certified trainer in the pedagogical integration of digital technologies and actively supports innovative educational practices that promote creativity, collaboration, and problem-solving skills in schools.