Martin is the director of the OakTree Charitable Trust, a nonprofit organization that runs the Irish Centre for Shamanic Studies and The Transpersonal Institute at Dunderry Park. The Centre is dedicated to promoting and preserving shamanic traditions from around the world, particularly those of the pre-Celtic and Celtic era. Contemporary Transpersonal approaches are also taught at the centre. Martin has worked as a mental health care professional since 1977. He is a member of OBOD and an accredited transpersonal /Jungian psychotherapist.