A native of San Antonio, Texas, Dr. Macias attended Catholic elementary school and graduated from Thomas Jefferson High School in 1975 and received his undergraduate degree in Biology from St. Mary’s University. He continued his dental education at the University of Texas Health Science Center Dental School at San Antonio and graduated in 1983. While establishing his private practice, Dr. Macias was an assistant professor in the Department of General Practice at the UT Dental School from 1983 until 1989.‍A great love of sports drove Dr. Macias to become involved with sports dentistry, having served as the team dentist for the San Antonio Spurs.