Kimberly Cook-Nelson is executive vice president of nuclear operations and chief nuclear officer of Entergy, where she is responsible for the safe, secure and reliable operations of Entergy's four nuclear power plants and five reactors located in Arkansas, Louisiana and Mississippi. Prior to her current role, she served as chief operating officer, nuclear operations and as Entergy’s vice president, system planning and operations. In Kimberly’s 27 years with Entergy, she has held roles in the headquarters office as well as various leadership positions of increasing responsibility in her 18 years at Waterford 3 nuclear station.

She has an MBA, a master's degree in engineering management and a bachelor's degree in mechanical engineering from the University of New Orleans. She also attended the Advanced Management Program at the Harvard Business School. Early in her career she was licensed as a professional engineer and received her senior reactor operator license from the U.S. Nuclear Regulatory Commission for Waterford.