John K Holmen HPC Engineer Contact holmenjk@ornl.gov | 865.341.2149 All Publications Towards the Development of an Exascale Network Digital Twin... Making Uintah Performance Portable for Department of Energy Exascale Testbeds... Early experiences on the OLCF Frontier system with AthenaPK and Parthenon-Hydro Frontier: Exploring Exascale Evaluating the Cloud for Capability Class Leadership Workloads... Strengthening the US Department of Energy’s Recruitment Pipeline: The DOE/NNSA Predictive Science Academic Alliance Program (PSAAP) Experience Early Experiences on the OLCF Frontier System with AthenaPK and Parthenon-Hydro Key Links Google Scholar LinkedIn GitHub ORCiD Organizations Computing and Computational Sciences Directorate National Center for Computational Sciences Operations Section System Acceptance and User Environment Group