Jill Joyce is a Registered Dietitian who hates kale and loves chocolate. She is an Associate Professor and the Co-Director of the Tactical Fitness and Nutrition Lab at Oklahoma State University. Originally from Pittsburgh, Pennsylvania, she spent nine years after graduation moving around the country with her husband during his active-duty Army service, working in a variety of settings as a dietitian.

As a researcher, Jill investigates how healthy tactical athletes (fire, law enforcement, and military) fuel themselves, why they make the nutrition choices they do, and which interventions are most effective in helping them optimize nutrition for health and performance.