William Jefferson

Jefferson oversees emergency response, engineering and asset management, environmental health and safety, field operations support, major projects, operational excellence, work management, and contractor support.

Jefferson joined NiSource from STP Nuclear Operating Company, where he served as site vice president. Prior to that, he served as plant general manager and operations director for STP. Earlier in his career, he served as vice president, transmission maintenance and construction at Duke Energy, and also served as vice president of the Harris Nuclear Plant for Progress Energy and vice president of the Turkey Point and St. Lucie nuclear plants for Florida Power and Light.

Jefferson also served in several roles of increasing responsibility with Exelon Generation Company / PECO Energy Company, including plant manager at Susquehanna Electric Company, senior manager of plant engineering at Peach Bottom Atomic Power Station, and manager of reactor services at PECO Nuclear.

Jefferson has more than 35 years of experience in the utility industry. He earned his Bachelor of Science degree in nuclear engineering from Purdue University. He attended the Duke Fuqua Advanced Management Program and earned a senior reactor operator's license from Peach Bottom nuclear plant.