She received her Doctor of Pharmacy degree from the University of the Pacific, M.S. Ed. (with a science education concentration) from Old Dominion University, and a B.A. in Biology from California State University-Fresno. She is a licensed pharmacist in Virginia and California and has over twenty-eight years of clinical pharmacy experience, primarily in hospital settings, both in the federal government and private industry. Dr. Masterson serves as the faculty advisor for the Pre-Pharmacy Honor Society and has been a Grand Prize Judge for many years at the Fairfax County Regional Science Fair. She has had a long-time professional interest in anti-coagulants and was a guest speaker on this subject at the Joint Armed Forces Pharmacy Conference in Atlanta in 2006.