DavidĀ Appelhans
Senior Manager at NVIDIA
Broomfield, Colorado, United States
Summary
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Top SchoolDavid Appelhans is a manager and hands-on engineering leader with 11 years of experience applying high-performance computing and numerical methods to real-world problems, currently leading Developer Technology Engineering at NVIDIA. He has deep expertise in optimizing CPU+GPU heterogeneous workloads, demonstrated by work at IBM and as a postdoc preparing DOE codes for Summit and Sierra, where he influenced the OpenMP standard for better performance portability. David blends research rigor (PhD in Applied Mathematics) with practical system-level performance modeling and production-focused porting across CUDA, OpenMP4, and MPI. Based in Broomfield, Colorado, he is known for translating domain-specific algorithms into reusable, portable implementations and for contributing technical input to next-generation supercomputer proposals.
11 years of coding experience
7 years of employment as a software developer
M.S., Physics, M.S., Physics at Colorado School of MinesDoctor of Philosophy (PhD), Applied Mathematics, Doctor of Philosophy (PhD), Applied Mathematics at University of Colorado Boulder
English, Spanish
Stackoverflow
1reputation
0reached
0answers
0questions
Github Skills (22)
matlab9
scientific-computing9
multi-gpu8
hpc8
proxy8
cuda5
preprocessor5
gpu5
mpi5
exascale4
python3
metaprogramming3
3d3
gpu-programming3
fortran3
Programming languages (6)
Github contributions (5)
dappelha/MultiGridMatlab
Apr 2016 - Nov 2021
Easy to understand Matlab code for geometric multigrid. Great for learning multigrid, with plots at every step.
Contributions:8 commits, 5 pushes, 1 branch in 5 years 8 months
matlab
llnl/UMT
Mar 2016 - May 2019
UMT (Unstructured Mesh Transport) is an LLNL ASC proxy application (mini-app) that solves a thermal radiative transport equation using discrete ordinates (Sn). It utilizes an upstream corner balance method to compute the solution to the Boltzmann transport equation on unstructured spatial grids.
Contributions:167 commits, 1 PR, 2 pushes in 3 years 2 months
proxyradiation-transportunstructured-mesheshpcscientific-computing
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