Johannes Blaschke is a Computer Systems Engineer at the National Energy Research Scientific Computing Center (NERSC), specializing in workflow and application performance on HPC systems. He leads the NERSC Science Acceleration Program, and is helping design the next generation of supercomputers at NERSC. Johannes is passionate about urgent and interactive computing on supercomputers and emergent, highly heterogenous hardware. Before coming to NERSC, Johannes worked as a postdoc on developing fluid-structure interaction codes at the Technical University of Berlin, and at Lawrence Berkeley National Laboratory.