A Nuclear Engineer and environmentalist who spent the first ten years of her career redesigning nuclear reactors to make them safer and reducing the amount of waste they produce. Together with a classmate from MIT, she created and served as CEO for Transatomic Power, reimagining a 1960s design for a molten salt reactor. Leslie earned a Ph.D. in nuclear engineering with a research focus on computational nuclear materials from MIT, where she also earned S.B. degrees in mechanical engineering and nuclear engineering. She has served on the MIT Corporation, MIT’s board of trustees, and on the National Academy of Engineering’s study, “Laying the Foundation for New and Advanced Nuclear Reactors in the United States.” Leslie has been named a TIME Magazine "30 People Under 30 Changing the World," an MIT Technology Review "Innovator Under 35," a World Economic Forum Young Global Leader, and a National Geographic Explorer.