Dr. Marwit has devoted over forty years to helping people move successfully through life's major transitions. His philosophy is that people need to embrace life's inevitable changes and reach for the best of what lies ahead. His work focuses on helping individuals identify their positive attributes and inherent skills so they can effectively transition from one life stage to another, and from crisis to adaptation and change.

The majority of his work is with older adults negotiating middle and later life transitions, and adolescents moving toward young adulthood. In all his work, ranging from his clinical practice to his research and community involvements, Dr. Marwit's commitment is to helping each person reach and maintain a happy and effective life.