Marissa Giustina is a staff research scientist and quantum electronics engineer. She developed and deployed superconducting device packaging that enabled Google’s unprecedentedly capable “quantum supreme” Sycamore processor. As head of device packaging and co-author of the team’s roadmap, Giustina is responsible for both research and engineering developments in the device integration that lies at the heart of the quantum computing hardware system. Giustina studied engineering at Dartmouth College with a focus on electrical and materials engineering, moving to foundational research in experimental quantum physics at Uni of Vienna. For her PhD (advised by quantum pioneer Anton Zeilinger), she designed and built a 60-meter-long precision apparatus, leading a local team and collaborating with senior scientists at five institutions to settle a 50-year outstanding challenge in the foundations of quantum mechanics. Giustina joined Google in 2016. As Google Quantum AI’s first female scientist, she helped grow the team to ~150 members. She is a highly sought-after speaker: as Senior Technical Spokesperson for Policy Engagements, she represents Google to prominent global academic, government, and media audiences. She prioritizes meeting students, especially from underrepresented backgrounds, undertaking one-on-one mentorships. Giustina featured in Fortune’s 40 Under 40, and Future 50. She served on US National Quantum Initiative Advisory Committee as its youngest member (2020-22)