At the Department of Defense, Dr. Winkenwerder was the leader of the Military Health System and the principal medical advisor to the Secretary of Defense, responsible for medical services provided to all active and retired military service members throughout all branches of service. With responsibility for a budget of $40 billion and over 130,000 personnel worldwide, the Military Health System Provides care for 9.2 million military service members and families through a global network of private physicians and more than 70 hospitals worldwide, known as TRICARE.