Leadership / Marsha McCombs Shields Marsha McCombs Shields Director Since 2026 Biography Marsha McCombs Shields is the CEO and managing partner of McCombs Enterprises and oversees the Red McCombs family’s core businesses including Red McCombs Automotive Group, McCombs Energy Ltd. and McCombs Family Partners Ltd. She is also the president and director of the McCombs Foundation Inc., a trustee of the Texas Biomedical Research Institute, and a member of the Board of Visitors of the University of Texas M.D. Anderson Cancer Center. She holds a Bachelor’s Degree from Duke University and also completed an executive education program in accounting, finance, and business management from the University of Texas at Austin.