Dr. G. Ingmar Meijer received his Ph.D. degree in physics from the Swiss Federal Institute of Technology (ETH) Zurich in 1999. He joined the IBM Research Zurich in 1999 as a Research Staff Member. He was responsible for materials science aspects of the SiON optical waveguide technology. He then worked on exploratory research projects to develop novel non-volatile memory devices based on transition metal oxides (Who wins the nonvolatile memory race? Science 319 (2008)). His present project concentrates on liquid cooling for energy efficiency in data centers. A hot-water cooled supercomputer, dubbed Aquasar, was built in 2010 to explore and pilot the innovative water-cooling system (Cooling energy-hungry data centers, Science 328 (2010)). Dr. Meijer is the lead cooling architect for the warm-water cooled supercomputer SuperMUC, Leibniz Rechenzentrum, Garching, Germany. He holds more than 30 patents.