Maritina Pantoleontos is a licensed psychologist (License No. 389380/23), a relational psychoanalytic psychotherapist, and a trainee group psychotherapist. She is a prospective faculty member and Executive Administrator of the Institute for Relational and Group Psychotherapy of Athens, while also she is a scientific associate at the holistic psychotherapy center In Between. She graduated from the Department of Psychology at the National and Kapodistrian University of Athens and has completed postgraduate diploma in clinical skills based on relational psychoanalytic psychotherapy. Currently, she is pursuing a postgraduate diploma in applied group psychotherapy, following the international interpersonal model of Irvin Yalom, at the Institute for Relational and Group Psychotherapy. She has completed over 1300 hours of mandatory and voluntary clinical practice. Since 2020, she has been engaged in ongoing personal individual and group psychotherapy on a weekly basis and is currently receiving clinical supervision five times per month. She contributed as an author to the second collective volume on relational psychoanalysis and group psychotherapy according to Irvin Yalom, published by DISIGMA Publications in 2024. As part of her professional development and continuing education, she actively attends and participates in numerous seminars, training programs, and conferences both in Greece and abroad. She is a member of the International Association for Relational Psychoanalysis and Psychotherapy (IARPP) and the American Group Psychotherapy Association (AGPA).