Jian Sun
Software Engineer at NCAR - The National Center for Atmospheric Research
Boulder, Colorado, United States
Summary
👤
Senior🎓
Top SchoolJian Sun is a software engineer with 11 years of experience specializing in GPU porting and performance optimization for weather and climate models, currently based at NCAR in Boulder. He combines deep expertise in OpenACC, OpenMP target offload, CUDA, ISO Fortran and JIT techniques with hands-on profiling using Nsight, ARM DDT and other analysis tools to squeeze performance from scientific codes. His background includes postdoctoral GPU-focused research at PNNL and a PhD in Civil Engineering, giving him a strong foundation in both numerical modeling and high-performance computing. Jian is comfortable bridging research and production, translating algorithmic needs into scalable, highly optimized implementations. He’s an avid learner who seeks new tooling and techniques to push model throughput and memory efficiency. Less obvious: he frequently pairs traditional Fortran workflows with modern JIT and tooling to modernize legacy scientific stacks.
11 years of coding experience
2 years of employment as a software developer
Doctor of Philosophy - PhD, Civil Engineering, Doctor of Philosophy - PhD, Civil Engineering at University of Tennessee-KnoxvilleBachelor of Engineering (BEng), Energy and environmental system engineering, Bachelor of Engineering (BEng), Energy and environmental system engineering at Zhejiang University
English, Chinese
Github Skills (60)
splines10
climate-model10
atmosphere10
system-configuration10
modeling-tool10
fortran10
earth10
snl-applications10
gis10
ode-solver10
earth-science10
case-control9
planetary9
prediction-model9
abstraction9
Programming languages (10)
Github contributions (5)
sjsprecious/ccs_config_cesm
Feb 2022 - Apr 2026
CESM CIME Case Control System configuration files
Contributions:148 pushes, 47 branches, 5 comments in 4 years 2 months
case-controlconfiguration-filescesmcontrol-systemsystem-configuration
sjsprecious/samurai
Oct 2020 - Aug 2024
Spline Analysis at Mesoscale Utilizing Radar and Aircraft Instrumentation
Contributions:23 PRs, 33 pushes, 47 branches in 3 years 10 months
aircraftinstrumentationsplineradar
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