Dr. Thomas Patterson was chairman of the Goldwater Institute from 2000 to July 2015. He was elected to the Arizona State Senate in 1989, serving as minority leader from 1991 to 1992 and majority leader from 1993 to 1996. Patterson was the author of legislation creating Arizona's charter school system and welfare reform program. Until 1998, he was a practicing physician and president of Emergency Physicians, Inc.. Patterson also served as president of the Arizona chapter of the American College of Emergency Physicians. He is a graduate of Yale University and the University of Nebraska.