Roger Cooke received his PhD (1974) from Yale University in Mathematics and Philosophy. From 1975-2005 he worked in the Netherlands, rst as assistant professor in Logic and Philosophy of Science at the University of Amsterdam, and later as professor of Applied Decision Theory in the Department of Mathematics at the Delft University of Technology. In 2005 he moved back to the USA as senior fellow at Resources for the Future. In 2006-2008 he supervised the development of non-parametric continuous-discrete Bayesian Belief Nets for the Dutch Ministry of Transport. Subsequent development was under contract with Shell, AIRBUS, and the National Institute for Aerospace. In 2008 he was elected fellow of the Society for Risk Analysis. In 2010 he was named lead author in the fth assessment of the Intergovernmental Panel on Climate Change for the chapter on Risk and Uncertainty. In 2011 he received the Lifetime Distinguished Achievement Award from the Society for Risk Analysis. He currently works on uncertainty quanti cation in con- ceptual design for AIRBUS and on value of information of Earth Observation Missions for NASA Langley.