As the first Chief Medical Officer of the National Collegiate Athletic Association (NCAA), Dr. Hainline oversees the NCAA Sport Science Institute, a national center of excellence whose mission is to promote and develop safety, excellence, and wellness in college student-athletes, and to foster life-long physical and mental development.  The NCAA Sport Science Institute works collaboratively with member institutions and Centers of Excellence across the United States.

As a clinical and research neurologist, Brian has been actively involved in sports medicine for over 20 years.  He co-authored the book Drugs and the Athlete, and played a pivotal role in the development of drug testing and education protocols in sports worldwide.  He has served on the New York State Medical Advisory Board, the United States Olympic Committee (USOC) Sports Medicine Committee, and was a founding member of the Executive Committee of the American Academy of Neurology (AAN) Sports Neurology Section, where he continues to serve as councilor and chair of the strategic planning group. 

Dr. Hainline has played a pivotal role in the development of health and safety standards in tennis, both nationally and internationally.  He was Chief Medical Officer of the US Open Tennis Championships for 16 years, and then served as Chief Medical Officer of the United States Tennis Association before joining the NCAA. 

He is chair of the International Tennis Federation Sport Science & Medicine Commission, and oversaw the rollout of international wheelchair tennis competition, a sport for which he wrote the rules of eligibility for both para- and quad-tennis. 

In addition to his duties at the NCAA, Dr. Hainline is Clinical Professor of Neurology at New York University Langone School of Medicine.  He is the author of six books, and the author or co-author of numerous peer-reviewed journal articles and medical textbook chapters.  A former number one singles and doubles player at University of Notre Dame, Dr. Hainline continues to play competitive tennis.