Georgios Feretzakis is a researcher in the field of machine learning applications in healthcare and privacy-preserving decision trees. He holds a Bachelor’s degree in Mathematics, a Master’s degree in Biostatistics, a Master’s degree in Information Systems, and he received a PhD in Knowledge Hiding in Decision Trees from Hellenic Open University. He is a postdoctoral research fellow at the School of Science and Technology, Hellenic Open University. Moreover, he is an Adjunct Professor in the post-graduate program “Data Science and Machine Learning” at the Hellenic Open University. His current research and publications focus on applications of machine learning techniques in the medical domain.