He is Chairman of the Scientific Advisory Board of the American Parkinson Disease Association, a Deputy Editor of the journal Movement Disorders, a Fellow of both the American Academy of Neurology and the American Neurological Association, and First Vice President of the Association of University Professors of Neurology. He has previously served as a Director and Vice President of the American Neurological Association, and currently is the Vice Chair of the AON/ACTN Oversight Committee. He has also served on the NINDS Board of Scientific Counselors.