Isaac Meyer Marks (born 1935) was born in Cape Town, South Africa. He trained in medicine there, qualifying in 1956. His training as a psychiatrist began in 1960 at the University of London (at the Bethlem-Maudsley Hospital) and was completed in 1963. In 1971 he was a founder Member of the Royal College of Psychiatrists, and in 1976 he was elected a Fellow. From 2000-2003 he ran a computer-aided self-help clinic at Imperial College, London, where he was a Visiting Professor. He is now also Honorary Professor at the Free University of Amsterdam.