John is a managing director and Head of GX Labs, State Street Corporation’s center for R&D in risk management and data science in San Francisco, where he manages the group’s research program in multi-asset portfolio risk and sustainable investing. Before joining GX Labs he led the behavioral research group at State Street Associates in Cambridge, Massachusetts, developing models of market participant behavior and applying these to quantitative asset management. Prior to joining State Street in 2005 John was an astrophysicist at MIT, and he has also held research and teaching positions at Emmanuel College, the University of Michigan and the University of Massachusetts. He has taught courses in physics, astrophysics, applied mathematics, environmental impact of energy production and climate change, and has authored/coauthored roughly 40 articles in peer-reviewed journals and conference proceedings, including the Journal of Portfolio Management, the Astrophysical Journal, Advances in Space Research, Nuclear Physics B and the Astronomical Journal. His research has been profiled in media outlets including the New York Times, Science, and Discover. John has a PhD in astrophysics from the University of Michigan.