She also maintains a practice site in infectious diseases at Palmetto Health Richland. Justo received her doctor of pharmacy degree from the University of Florida College of Pharmacy in 2009. She completed a pharmacy practice residency (2009-2010) and an infectious diseases pharmacotherapy fellowship (2010-2013) at the University of Illinois at Chicago College of Pharmacy. She also received her master of science degree in clinical and translational science from the UIC School of Public Health in 2013.