Dr. Quillen was born and grew up in Massachusetts. He graduated from Colby College in Waterville, Maine in 1986 with a B.A. in Chemistry and History. He started graduate school at Duke University in Durham, North Carolina in 1996 and left in 1998 to start medical school at Wake Forest School of Medicine. In the summer of 1990, Dr. Quillen married Amy Bailey, and because she was starting law school at the University of North Carolina at Chapel Hill, Dr. Quillen transferred and finished his 3rd and 4th year of medical school at UNC. In 1995 he completed his Family Medicine residency program at Duke University and in 1996 he complete Duke’s Faculty Development Fellowship.
Dr. Quillen’s first faculty position started in the summer of 1996 as an assistant professor at the University of South Alabama in Mobile, Alabama, as a core family medicine residency faculty member. In October of 1998, Dr. Quillen joined the University of Florida, College of Medicine, Department of Community Health and Family Medicine as a core family medicine residency faculty member. He was promoted to associate professor in 2006. Over the 21 years at the University of Florida, Dr. Quillen participated in a variety of different opportunities that included serving on the COM admissions committee for 6+ years, Associate Chief Medical Information Officer for 2+ years, multiple hospital committees, Treasurer, vice-president and president of the COM faculty Council, chair of the University Faculty Senate and member of the University of Florida Board of Trustees. In 2019, Dr. Quillen joined the University of Central Florida faculty as associate professor and family medicine residency director for the UCF/HCA North Florida Hospital Family Medicine Residency Program. Dr. Quillen was promoted to professor in December of 2023.