Wim Haeck
Scientist at Los Alamos National Laboratory
Santa Fe, New Mexico, United States
Summary
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Senior🎓
Top SchoolWim Haeck is a nuclear data scientist with over a decade of experience specializing in Monte Carlo reactor physics, criticality safety, depletion and activation calculations. He has deep expertise in ENDF/GNDS formats and nuclear data processing (NJOY/PREPRO) and has led development and validation of depletion toolchains (ALEPH, VESTA, AURORA) now distributed via RSICC and the NEA Databank. At Los Alamos he maintains and modernizes NJOY and contributes to NJOY21, focusing on resonance reconstruction and data format migration to ENDF/B-VIII.0, while providing validation for MCNP and PARTISN. His background blends hands-on scientific software engineering (Fortran, C/C++, Python, Java), QA/version-control practices, and international collaboration (OECD/NEA WPEC SG38), making him adept at turning complex nuclear data into production-ready libraries and tools. An interesting detail: he has automated nuclear data processing workflows (GAIA, ALEPH-DLG) that both streamline NJOY pipelines and verify library quality, bridging research and operational deployment.
10 years of coding experience
11 years of employment as a software developer
PhD, Nuclear Physics & Engineering, PhD, Nuclear Physics & Engineering at Ghent University
Dutch, English, French
Github Skills (66)
python10
data-files10
data-processing10
missing-data10
fixed-width9
width9
topological-data-analysis9
monte-carlo9
ace9
meta-analysis9
forge8
splines8
beast8
data-structure8
generic-programming7
Programming languages (7)
Github contributions (5)
njoy/scion
Nov 2022 - Mar 2025
Contributions:21 reviews, 144 PRs, 259 pushes in 2 years 4 months
njoy/dryad
May 2024 - Mar 2025
Contributions:20 reviews, 67 PRs, 186 pushes in 10 months
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