Dr. Dirk Proske studied civil engineering in Dresden, Germany and London, U.K. He worked in Germany, South Africa and Indonesia, before going into scientific research at the Technical University in Dresden, Germany. Since 2006 he has served at the University of Natural Resources and Applied Life Sciences in Vienna, Austria. For several years Dr. Proske has been co-organizer of the Dresden Bridge Construction Conference and he is also the founder of the International Probabilistic Workshop. Dr. ir. Pieter van Gelder is a full-time associate professor of probabilistic methods in civil engineering at Delft University of Technology, where he has been involved in research and education in the field of safety and reliability for over 15 years. He also serves as a consultant for Nedstat BV, a part-time lecturer at IHE and PAO, and currently a member of the managerial board at ESRA. Van Gelder holds visiting professorships at the University of Waterloo, Canada, and at the Norwegian University of Science and Technology in Trondheim, Norway.