Petros Koumoutsakos is the Gordon McKay Professor for Computing in Science and Engineering and the Director of the Institute of Applied Computational Science at Harvard University. Petros is currently on leave from ETH Zurich where he holds the Chair for Computational Science since 2000. He is former chair of both PRACE Scientific Steering Committee and the Access Committee. Petros is elected Fellow of the American Society of Mechanical Engineers (ASME), the American Physical Society (APS), the Society of Industrial and Applied Mathematics (SIAM). He is recipient of the ACM Gordon Bell prize in Supercomputing and he is elected Foreign Member to the US National Academy of Engineering (NAE). His research interests are on the fundamentals and applications of computing and artificial intelligence to understand, predict and optimize fluid flows in engineering, nanotechnology, and medicine.