Dr. Apostolos Kostas holds a Computer and Informatics Engineering Diploma from the Polytechnic School, University of Patras, Greece, a 2-year Master’s Degree Diploma from the Computer Science Department, University of Athens, Greece, and a Ph.D. from the Primary Education Department, University of the Aegean, Greece. H worked in Germany for two years as a Research & Development Engineer, and from 2002 to 2023, he served as a Member of Technical and Laboratory Staff and Member of Laboratory and Teaching Staff at the University of the Aegean. His current position at the University of the Aegean, Primary Education Department is Assistant Professor on "Digital Environments for Education, Training and Teachers' Professional Development". Since May 2018, he has served as the elected Director of the Center for Life-Long learning, University of the Aegean, while since 2020, he has served as Tutor at the Hellenic Open University. Dr. Kostas has participated in many national and EU-funded programs, and his research interests include e-Learning, Web 2.0 in Education, Communities of Practice and Learning, and AI in Education. Outcomes of his research work have been presented in national and international conferences and published in journals and book chapters.