Jaen holds the the Dr. and Mrs. James L. Holly Distinguished Chair at UT Health San Antonio and was elected as a member of the National Academy of Medicine in 2013. He has been selected to the Best Doctors in America since 2002. Jaen received his MD and PhD degrees in epidemiology and community health from the State University of New York at Buffalo, and completed his residency in family medicine and a fellowship in primary care research at Case Western Reserve University.