Dr. Sumner is an Epidemiology Merit Fellow and Instructor at the Columbia University Mailman School of Public Health. At Columbia, Dr. Sumner has pursued research on stressful experiences and their impact on emotional and physical health. She is interested in identifying who may be most vulnerable to the effects of stress and trauma, and her work incorporates genetic, neuroendocrine, physiological, and environmental predictors. Dr. Sumner completed her pre-doctoral internship at the Charleston Consortium, where she gained experience with treating anxiety and mood disorders. During internship, she specialized in the treatment of traumatic stress disorders. She received extensive training in Prolonged Exposure and Cognitive Processing Therapy, two of the leading therapies for posttraumatic stress disorder (PTSD). Dr. Sumner was the recipient of the Clinical Excellence Award for her internship class. Dr. Sumner has published over 25 papers in peer- reviewed journals, including Molecular Psychiatry, Biological Psychiatry, Journal of Abnormal Psychology, and Psychoneuroendocrinology.