His current work focuses on the enormous overuse of antibiotics of human importance in U.S. livestock production—a practice that continues to worsen the global crisis of antibiotic-resistant infections, like MRSA. Prior to rejoining NRDC in April 2015, he cofounded Healthy Food Action, Keep Antibiotics Working: The Campaign to End Antibiotic Overuse, and he created and directed the health program at the Institute for Agriculture and Trade Policy in Minneapolis.