She received her DVM in 1981, and her Masters degree in Physiology in 1990, from the University of Georgia. She became a diplomate of the American College of Veterinary Internal Medicine in 1991. Dr. Williamson joined the faculty at the University of Georgia College of Veterinary Medicine in 1989. She is currently a field service clinician who works with all large animal species. Her research efforts have been directed at characterizing anthelmintic resistance in sheep and goats, and camelids. Dr. Williamson is a member of the American Association for Small Ruminant Parasite Control, and has organized and conducted many FAMACHA workshops. She is the vice president of the Alpaca Research Foundation. She currently serves as the Region 2 representative on the American Association of Small Ruminant Board of Directors.