Mitchell received a DVM and an MS in wildlife epidemiology from the University of Illinois in 1992 and 1997, respectively. He completed a PhD in wildlife epidemiology at Louisiana State University in 2001. He has spent his entire career working as a professor of zoological medicine at these 2 institutions and
has authored more than 800 book chapters, peer-reviewed articles, scientific abstracts, proceedings, and lay articles. He is a past president (2000-2001) of the Association of Reptilian and Amphibian Veterinarians, a former coeditor in chief of the Journal of Exotic Pet Medicine (2005-2019), a former editor-in-chief of the Journal of Herpetological Medicine and Surgery (2009-2021) and currently servs as editor in chief of the Journal of Avian Medicine and Surgery (2021-present). Mitchell is also the first recipient of the ARAV Excellence Award (2016).