Guilherme Lima
Applications Physicist
North Aurora, Illinois, United States
Summary
👤
Senior🎓
Top SchoolGuilherme Lima is an Applications Physicist with over a decade of experience developing high-performance simulation software for high energy physics, currently working in Fermilab’s Geant R&D group on the Celeritas project to bring micro-parallelized, GPU-optimized algorithms to detector simulation. He combines deep domain knowledge from long-term participation in major experiments (DØ, ATLAS, ILC/SiD, CALICE) with hands-on software engineering across multi-threading and multi-processing frameworks to modernize one of HEP’s most time-consuming codebases. A Geant4 International Collaboration member and former GeantV contributor, he bridges research and production needs while exploring deep learning applications for simulation and analysis. Trained with a Ph.D. in Physics, he’s equally comfortable designing data structures for parallel architectures and contributing to physics analysis, and he actively seeks collaborations and challenging roles that leverage both his scientific rigor and software craftsmanship. An often-overlooked strength is his long institutional memory across successive HEP generations, which helps translate legacy workflows into performant, future-ready implementations.
12 years of coding experience
B.S., Physics, B.S., Physics at Universidade Federal do ParáPh.D., Physics, Ph.D., Physics at Centro Brasileiro de Pesquisas Físicas
Portuguese, English, Spanish
Github Skills (38)
simulation10
computational-physics10
transport10
energy10
high-energy-physics10
detectors10
hip10
physics10
gpu10
cuda10
high-performance10
monte-carlo10
vectorization6
cascade6
emoji6
Programming languages (7)
Github contributions (5)
mrguilima/celeritas
Oct 2020 - Mar 2025
Contributions:363 pushes, 103 branches in 4 years 5 months
mrguilima/GeantExascalePilot
Feb 2020 - Jun 2020
Geant Exascale Pilot application
Contributions:4 PRs, 19 pushes, 8 branches in 3 months
exascalepilot
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