Klaus Keller is a professor of geosciences at Penn State (where he directs the Center for Climate Risk Management) and a visiting professor at the Thayer School of Engineering, Dartmouth College. Before joining Penn State, he worked as a research scientist and lecturer at Princeton University and as an engineer in Germany.  Professor Keller graduated from Princeton with a Ph.D. in civil and environmental engineering.  He received Master’s degrees from M.I.T. and Princeton, as well as a Diplom-Ingenieur Degree from the Technische Universität Berlin. His research addresses two interrelated questions.  First, how can we mechanistically understand past and potentially predict future changes in the Earth system?  Second, how can we use this information to design sustainable, scientifically sound, technologically feasible, economically efficient, and ethically defensible risk management strategies?  He analyzes these questions by mission-oriented basic research covering a wide range of disciplines such as engineering, Earth sciences, economics, philosophy, decision science, and statistics.  He contributed to reports from the Intergovernmental Panel on Climate Change, co-edited an open source textbook, and published more than 130 peer-reviewed studies. His research, mentoring, and service have been recognized by several prizes, for example the 2019 Penn State Outstanding Postdoc Mentor Award.