Dr. Willey has an outpatient clinical practice in neurology with a focus on cerebrovascular diseases and stroke, and attends on the inpatient stroke service.He is actively involved in teaching of non-medical students in the health sciences campus, medical students in the pre-clinical and clinical years, and neurology residents and fellows. Dr. Willey is the vascular neurology fellowship program director, and the NewYork-Presbyterian/Columbia University Medical Center campus Comprehensive Stroke Center medical director.Dr. Willey's research is focused on risk factors for clinical and subclinical cerebrovascular disease with a particular focus on the role of physical activity, and on mechanisms of stroke in mechanical circulatory support. He is the local principal investigator for several acute and hospital based stroke clinical trials.