She has worked at the National Institutes of Health, Washington Hospital Center, and the obesity clinic at Children's National Medical Center. In addition to her work at GWUWMP, Ms. Weissberger runs a private practice in Bethesda, Maryland and consults with area fitness clubs. She specializes in adult and pediatric nutrition counseling for obesity, cardiovascular disease, diabetes, pregnancy, eating disorders, sports nutrition, digestive disorders, and epilepsy.