Joris studied mathematics and computer science at Utrecht University. He did his PhD on distributed multiscale computing at the University of Amsterdam in the Computational Science Lab. His thesis ranges from multiscale modeling methodology to the performance of distributed multiscale simulations; its application ranges from biomedical research to the simulation of fusion plasma physics. It also resulted in the public domain distributed multiscale simulation runtime environment MUSCLE 2. After his PhD, he worked at the Netherlands eScience Centre on traffic and crowd simulation platforms, with a focus on Indian environment. Before his PhD, Joris was a visiting researcher at SACEMA in South Africa to work on an epidemiological model combining HIV and TB disease dynamics. He adapted another model on sexually transmitted diseases so it was simulated with volunteer computing, using BOINC. He is interested in efficient and distributed computing with a societal impact. This involves scientific methods, fast and secure networking software and preparing various data sources for unified analysis and visualisation.