Executive Team

Susan S. de Mars, J.D.
Chief Legal Officer


Susan S. de Mars, J.D., Chief Legal Officer

Susan de Mars is senior vice president and general counsel for the United States Pharmacopeia (USP). She also serves as secretary to the USP Board of Trustees and the USP Convention. She is responsible for all legal, regulatory, and governance issues affecting USP.

Before coming to USP, Ms. de Mars was a partner at the law firm of Reed Smith LLP in Washington, D.C., where her practice included regulatory and legislative counseling and advocacy, fraud and abuse issues, compliance, and other healthcare matters.

Prior to joining Reed Smith, Ms. de Mars spent nearly 10 years in the pharmacy benefit management (PBM) industry, where she held various management and legal positions. She most recently served as senior vice president of Government Affairs, and general counsel of AdvancePCS, where she was responsible for all legal, regulatory, and compliance matters, as well as the government relations activities of the company. Previously, she was senior vice president and general counsel of PCS Health Systems.

Before working in the PBM industry, she was a partner at the law firm of Sacks Tierney, P.A. in Phoenix, Arizona, where she practiced in a variety of areas including corporate law, partnerships and joint ventures, employment law, bankruptcy, real estate, and healthcare regulatory issues and transactions.

Ms. de Mars is a cum laude graduate of Harvard Law School and received her B.A. degree from Claremont McKenna College, summa cum laude.