JaeHyuk Kwack works at performance engineering group at Argonne Leadership Computing Facility. He received his B.S. and M.S. in engineering from Seoul National University, South Korea, and a Ph.D. and post-doctoral training in computational mechanics for computational fluid dynamics (CFD) and fluid solid interaction (FSI) from University of Illinois at Urbana-Champaign, USA. Before joining Argonne, he had worked for Blue Waters supercomputing project at National Center for Supercomputing Applications. At Argonne since 2018, he has been working on OpenMP offloading model, performance tools and math libraries for the coming US DOE exa-scale system, Aurora at Argonne in 2021.