Konstantinos Mouchalos was born in Athens, Greece and made studies in Psychology at Deree the American College of Greece. Later on he trained as a psychotherapist in the Cognitive Analytic Therapy(CAT) model at the Institute for Cognitive Analytic Therapy(which has now been renamed as Institute for Relational and Group Psychotherapy). He had fulfill his military obligations in the medical division, as a psychologist in the Army Hospital of Rhodes. Afterward he continued his studies at the National and Kapodistrian University of Athens (UoA) in Psychology and more specific in Medical Psychology and Psychotherapy. Furthermore he have been trained in Psychological First Aid (P.F.A.) through John Hopkins University. The last four years he have been practicing in his private office at Glyfada, Athens. He is a member of IARPP since 2017 and lately he has been a member of the Candidate's Committee of IARPP, representing Greece. He is also a trainee member in group psychoanalysis at the Institute for Relational Group Psychotherapy.