Mark is a psychoanalyst and neuropsychologist, best known for his discovery of the brain mechanisms of dreaming and his use of psychoanalytic methods in contemporary neuroscience. He holds the Chair of Neuropsychology at the University of Cape Town and Groote Schuur Hospital and is the President of the South African Psychoanalytical Association. He is also Research Chair of the International Psychoanalytical Association. Mark has received numerous awards, notably Honorary Membership of the New York Psychoanalytic Society, the American College of Psychoanalysts and the American College of Psychiatrists. He has published more than 250 articles and book chapters, and 6 books. His second book, The Neuropsychology of Dreams, was a landmark contribution to the field. His 2002 book (with Oliver Turnbull), The Brain and the Inner World was a best-seller and has been translated into 13 languages. His latest book, on the hard problem of consciousness, is The Hidden Spring.
Mark has a naturalistic worldview and a sentiocentric moral scope. However, although his son and daughter in law are vegan, Mark hasn't yet put this aspect of conceptual Sentientist worldview fully into practice.