Constantinos lives and works in Athens. He studied psychology at the Eötvös Lorand University of Budapest, Hungary, from which he graduated in 1981. From 1982 to 1985 he attended graduate courses in social psychology at the Ecole Pratique des Hautes Etudes in Paris, France. He was trained in psychodrama mainly by Max Clayton, whose psychodramatic perception and philosophy he follows in his training and therapeutic practice.

Constantinos founded the Psychodrama Centre for Personality Development (PSYKAP) in Athens in 2000 in view of the development of psychodrama in Greece. He is a partner, external trainer and examiner at the Centre for the Study and Application of Psychodrama | Sofia Symeonidou.