Robert R. Johnson, D.O., serves as the Medical Director for the Amen Clinics, Inc. Board-certified in Psychiatry and Addiction Medicine, Dr. Johnsons previous roles include Medical Director of Sierra Tucson and Senior Medical Director of College Hospital. He is also a Certified Executive Coach who has worked with Rockwell International, Sony, Disney, and the US Olympic Committee. Dr. Johnson has done research on psychopharmacology, depression, and physical illnesses that produce psychiatric symptoms.