Leah Ellis is the CEO and co-founder of Sublime Systems, a company revolutionizing the cement industry through its breakthrough process to produce low-carbon cement. With a pilot plant in Somerville, Massachusetts capable of producing 250 tons of decarbonized cement annually, Sublime was recently awarded $87 million by the DOE’s Office of Clean Energy Demonstrations to build their first commercial plant in Massachusetts. Leah and her co-founder, Yet-Ming Chiang, developed the technology while she was an NSERC/Banting Postdoctoral Fellow at the MIT Department of Materials Science and Engineering. Leah holds a PhD in chemistry from Dalhousie University, where she worked with Professor Jeff Dahn on lithium-ion battery optimization in partnership with 3M and Tesla. Leah has been recognized as one of MIT Technology Review's 35 Innovators under 35 and as a Boston Globe Tech Power Player.