Leah Ellis is the CEO and co-founder of Sublime Systems, a company revolutionizing the cement production industry through its breakthrough low-carbon process. With a pilot plant in Somerville, Massachusetts capable of producing 100 tons of decarbonized cement annually, Sublime recently secured a $40 million series A funding to drive growth. 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 is an Activate Boston Entrepreneurial Fellow and has been recognized as one of MIT Technology Review's 35 Innovators under 35.