John S Pixley joined the faculty at Texas Tech University Health Science Center as the J T and Margaret Talkington Endowed Chair and Division Chief in Rheumatology/Immunology in 2015. Previously, he was at the University of Nevada School of Medicine as Division Chief of Rheumatology. His research over the past 20 years has focused on developing in utero transplantation as a scientific method and its poorly recognized capability to further understanding of Immune ontogeny of self-tolerance and Human stem cell pluripotency in vivo in a tolerant environment.