Sossina M. Haile is the Walter P. Murphy Professor of Materials Science and Engineering at Northwestern University, a position she assumed in 2015 after serving 18 years on the faculty at the California Institute of Technology. She earned her Ph.D. in materials science and engineering from the Massachusetts Institute of Technology. Haile’s research broadly encompasses solid state ionic materials and devices, with particular focus on energy technologies. She has established a new class of fuel cells based on solid acid electrolytes, and demonstrated record power densities for solid oxide fuel cells. Her more recent work on water and carbon dioxide dissociation for solar-fuel generation by thermochemical processes has created new avenues for harnessing sunlight to meet energy demands. She has published more than 150 articles and holds over 15 patents on these and other topics. Haile is the recipient of many prestigious awards, including an American Competitiveness and Innovation (ACI) Fellowship in 2008 from the National Science Foundation in recognition of "her timely and transformative research in the energy field and her dedication to inclusive mentoring, education, and outreach across many levels"; the 2010 Chemical Pioneers Award of the Chemical Heritage Foundation; and the 2012 International Prize in Ceramics of the World Academy of Ceramics. In 2015 she was inducted into the African Academy of Sciences. Her national service includes membership on the National Materials Advisory Board, a committee serving the National Academies of Sciences and of Engineering, from 2005 to 2011; co-authorship of the National Academies study America’s Energy Future: Electricity from Renewable Resources, published in 2009; and membership on the Materials Research Society Board of Directors from 2011 to 2015.