Spyridon Kleftakis is a PhD Candidate in the Department of Digital Systems of the University of Piraeus in the general research area of ​​Digital Health Services, focusing on algorithmic data analysis based on digital twin simulations with expanded information from a wide range of information. He is a graduate of the Postgraduate Program “Digital Systems and Services” in the field of “Advanced Information Systems” of the School of Information Technology and Communications of the University of Piraeus. Participates in European and National projects (eg beHEALTHIER), conducting research to develop an innovative platform for the management of holistic Health data in order to effectively exploit them for health policy making. As a Lead Software Engineer, with previous experience in software design and development, specializing in health informatics and web application development, he has worked on many projects in the field of information technology and has many years of experience in matters of human resource management.