Nathan Zasler, MD, is Founder, CMO and CEO of Concussion Care Centre of Virginia, Ltd., as well as Tree of Life Services, Inc. and Vice-Chairperson of the International Brain Injury Association (IBIA). Dr. Zasler is board certified in PM&R, fellowship trained in brain injury and subspecialty certified in Brain Injury Medicine. He is an affiliate professor in the VCU Department of Physical Medicine and Rehabilitation, Richmond, VA, and an adjunct associate professor in the Department of Physical Medicine and Rehabilitation at the University of Virginia, Charlottesville.