Dr David Leiman is a board certified psychiatrist who completed his medical doctorate at Boston University School of Medicine, and later residency and fellowship training in Psychiatry at Boston Medical Center, with special focus on Biobehavioral Science. This included use of both traditional psychotherapy as well as cognitive-behavioral/behavioral medicine approaches for anxiety and mood disorders, as well as to help treat patients with various medical conditions. Earlier in his career, he was involved with the cardiac rehabilitation programs at both the former University Hospital (BMC) and Brockton Hospital, operated the Stress Clinic of the Department of Medicine at Brockton Hospital, and practiced behavioral medicine oriented outpatient psychiatric care at the former University Hospital. He spent 24 years as Chief of Psychiatry at Brockton Hospital (Signature Healthcare), stepping down in 2017 from that position. He continued his outpatient clinic and consultationliaison work for medical-surgical and emergency department units until transitioning to outpatient private practice with Oasis Behavioral Health Institute. He is a Clinical Assistant Professor of Psychiatry at Boston University School of Medicine, and over the years at Boston Medical Center and Signature Healthcare Brockton Hospital, he had participated in teaching/ training and supervising medical students, psychiatric residents, physician assistant students, and psychiatric nurse practitioner students.