Leadership Team

Glen Schuster

President
Chief Executive Officer

Eric Vallo

Executive Vice President
Chief Information Officer

Dr. Mary Mason

Chief Medical Advisor

Mark Anderson

Senior Vice President
Chief Operating Officer

Coy Yonce

Vice President
Chief Information Security Officer

Jack McKittrick

Vice President
Chief Financial Officer

Dr. Mary Mason

Chief Medical Advisor


Mary V. Mason, MD, MBA, FACP, is the founder and CEO of Little Medical School, an award-winning educational franchise that has inspired over 1 million children around the world since its creation in 1999.  She has over 23 years of managed care experience.  For over 16 years she served as a C-suite executive and Chief Medical Officer for Centene Corporation, a Fortune 25 company designing clinical and educational programs that improve health outcomes and literacy, and promote workforce development.  

Mason earned her Bachelor of Science degree in Bioengineering at the University of Illinois-Urbana/Champaign and her MD and MBA from Washington University. She completed clinical training at Washington University School of Medicine and Barnes-Jewish Hospital, where she was chief resident for the Department of Medicine. She is board-certified in internal medicine, is a fellow of the American College of Physicians, and a member of Alpha Omega Alpha Medical Honorary Society. 

An active member in the community, Dr. Mason is the president of the Dr. Genie’s Kids’ Foundation and the Washington University National Council for the Institute of Public Health. She is a member of the Forbes Business Council and the Fast Company Executive Board.   She has also been recognized as a member of the 2008 class of 40 under 40 and 2016 class of Most Influential Business Women by the St. Louis Business Journal. Most recently, Dr. Mason received the 2019 Washington University School of Medicine Alumni Achievement Award and a 2020 University of Illinois Alumni Award.