He is the co-director of the Birmingham Institute for Psychodrama, a psychotherapy training organisation, and Change Point Ltd, a training provider in criminal justice, mental health and social care settings. Clark has 20 years of experience as a group facilitator and trainer in the UK, Ireland, Greece, South Africa, Latvia, Sweden, Australia and the USA. A native of Chicago and graduate of Williams College, Massachusetts, he moved to the UK in 1987 to establish and serve as the first director of Geese Theatre UK, a company using applied drama in prisons and probation.