Lehman Garrison
Software Engineer at Scientific Computing Core, Flatiron Institute
New York, New York, United States
Summary
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RockstarLehman Garrison is a software engineer with 12 years of experience who brings an uncommon blend of astrophysics Ph.D. training and practical scientific computing expertise to the Flatiron Institute's Scientific Computing Core. Based in New York, he specializes in backend development, packaging, and test automation for scientific software, contributing meaningfully to high-profile open-source projects like Spack and Astropy. His Spack work shows deep familiarity with dependency management and reproducible builds across complex scientific stacks, while his Astropy contributions reflect a meticulous approach to QA and test-driven fixes. Lehman is comfortable navigating both research-driven codebases and robust engineering workflows, making him a reliable bridge between domain scientists and production software. Colleagues value his attention to detail and the ability to translate astrophysics problems into maintainable, well-tested software solutions.
12 years of coding experience
Github Skills (13)
dependency-management10
astropy10
build-system10
python10
package-management10
testing10
scientific-computing9
numpy9
build-tools9
package-manager9
package-manager-tool9
astronomy8
astrophysics8
Programming languages (15)
Github contributions (5)
spack/spack
Aug 2021 - Mar 2025
A flexible package manager that supports multiple versions, configurations, platforms, and compilers.
Role in this project:
Backend Developer
Backend DeveloperContributions:10 reviews, 13 PRs, 26 comments in 3 years 7 months
Contributions summary:Lehman primarily contributed to the Spack package manager by adding, updating, and maintaining package definitions for various software libraries and tools. Their work involved modifying package metadata files (package.py) to incorporate new versions, specify dependencies, and configure build options. The contributions span a range of software, including Python packages (e.g., py-asdf, py-typer, py-yt, py-disbatch), and scientific libraries (e.g., hdfview), demonstrating expertise in packaging and dependency management. The user also appears to contribute to adjusting package dependencies for upgrades.
compilerspythonradiussplatformslinux
astropy/astropy
Feb 2014 - May 2018
Astronomy and astrophysics core library
Role in this project:QA Engineer / Test Automation Engineer
QA Engineer / Test Automation EngineerContributions:6 commits, 1 PR, 3 comments in 4 years 3 months
Contributions summary:Lehman's contributions focused on improving the testing and documentation aspects of the astropy library. They addressed issues related to table row indexing and printing, fixing bugs and ensuring correct behavior with unsigned integers. The user also made minor improvements in documentation by adding clarifications. The user further refactored and improved test code, with specific improvements in whitespace and style.
astrologypythonscienceastrophysicsastrodynamics
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