Martens studied counterpoint, harmony, fuga, composition and film music between 1968 and 1972 with Nadia Boulanger en Darius Milhaud at the Conservatoire National Supérieur de Musique in Paris in France. He participated in the 1970 Master Class "Music Concrete" of Pierre Schaeffer. "Between 1969 and1978 he was appointed as Music Supervisor/Coordinator and film composer by the French network. He studied between 1978-1983 Philosophy and Clinical Psychopathology at Amsterdam University. In 1985 he completed his study psychoanalysis with Paul-Laurent Assoun (Paris). In 1997 he earned his PhD Forensic Psychiatry at Tilburg University, The Netherlands. Martens wrote more than 100 articles in international journals and chapters of books. He worked for 36 years as a psychoanalyst in forensic psychiatric hospitals and this inspired him to compose in a psychodynamic way. This means that his compositions are inspired by and are expressions of observed internal forces, drives, desires and conflicts of human beings. All of his albums were composed and produced by himself and are available in internet shops such as iTunes, Amazon, CD Universe, eMusic and so on. Martens Ensemble (see photo) plays his music.