Before co-founding the risk modeling company KatRisk LLC, Dag was a Vice President of Model Development at Risk Management Solutions in Newark, CA leading a team of modelers and software engineers building and implementing catastrophe models. He worked for 7.5 years on the development of continental scale flood risk models in RMS and RMS’ Next Generation risk modeling methodology. From 1999 to 2004 he was with the National Weather Service, NOAA/NCEP/EMC in Camp Springs, MD, where his main interest was data assimilation with real-time data, forecasting and hydrological modeling.
He received a Physics Diploma (Masters) from the Georg-August University in Goettingen (Germany) and a Ph.D. from Hamburg University (Germany) before working for 2 years as a postdoc at Princeton University. He received the 1999 Tison Award of the IAHS and has published numerous papers on risk modeling, hydrological modeling, model uncertainty, forecasting, data assimilation, and climate change.