Dr. Clayton Johnson, director of Veterinary Services, is a globally recognized swine health expert with Carthage Veterinary Services in Carthage, Illinois. A 2008 graduate of the University of Illinois College of Veterinary Medicine, he began his career with The Maschhoffs, LLC—where he helped double sow production—and later joined Carthage in 2016 to lead company health initiatives. Internationally recognized for pioneering bio-economic models to manage PRRS- and PED-related diseases, he’s a sought-after consultant in China, Southeast Asia, and beyond. In 2020, Dr. Johnson received the prestigious Allen D. Leman Science in Practice Award for excellence in integrating scientific rigor into swine health management. In 2026, he was awarded the Meritorious Service Award from the American Association of Swine Veterinarians (AASV) for his years of service to the swine veterinary community. He is licensed in seven states, leads a team of veterinary professionals, and, beyond veterinary practice, hosts “The Swine Health Blackbelt Podcast” a weekly podcast series reaching a global audience of >100,000 listeners serving to distill complex swine-health research into actionable insights.