Our Team

William Dietz, MD, Ph.D


William Dietz, MD, PhD, serves as Director of the STOP Obesity Alliance and Chair of the Redstone Center, providing his wealth of obesity expertise to enhance and develop the Alliance's research, writing and initiatives. Dr. Dietz is a nationally recognized expert in nutrition, physical activity, and obesity with years of government and academic experience. 

Dr. Scott Kahan, MD, MPH

Medical Director

Scott Kahan, MD, MPH, serves as Medical Director for the STOP Obesity Alliance, providing counsel and oversight for the Alliance's ongoing research, writing and initiatives. Dr. Kahan is a physician trained in both clinical medicine and public health. He is board-certified in Preventive Medicine, and his clinical practice specializes in weight management and obesity medicine.

Cristy Gallagher, MPAff

Research Project Director

Cristy Gallagher, MPAff, serves as Research Project Director for the STOP Obesity Alliance, where she manages and coordinates research projects on obesity. Cristy has 20 years of experience working in Washington, DC, on health, human services, and education policy.