Saul Griffith, PhD, is an engineer, inventor and MacArthur “Genius Grant” recipient who has founded more than a dozen clean-energy technology companies. He specializes in electrification, renewable energy innovation and large-scale decarbonization strategy. As founder and chief scientist of Otherlab, he has led major energy infrastructure projects for NASA, DARPA and ARPA-E and authored influential books including Electrify and The Big Switch. He also founded Rewiring America and Rewiring Australia, advancing policy and public action toward a fully electrified future.