Jeff Johnson
Principal Consultant at Cohere Consulting LLC
Seattle, Washington, United States
Summary
👤
Senior🎓
Top SchoolJeff Johnson is a Principal Consultant and hands-on technical leader with 11+ years building high-performance scientific and engineering software, from climate modeling and atmospheric simulators to low-latency networking and videoconferencing systems. He excels at simplifying complex, legacy codebases—applying test-driven design, performance-minded algorithms (C++, Fortran, Python, MPI) and unobtrusive UX—to deliver maintainable solutions that reveal underlying structure. At Lawrence Berkeley and national labs he led small interdisciplinary teams on mission-critical simulations and numerical toolkits, and more recently runs Cohere Consulting to help organizations convert messy technical debt into practical, well-documented systems. Known for a "helping less be more" mindset, he pairs deep domain modeling with pragmatic process improvements and automated workflows to increase discoverability and reduce maintenance costs. Based in Seattle, he combines research rigor (PhD-level applied science) with product-focused consulting, often surfacing non-obvious simplifications that unlock long-term value.
11 years of coding experience
13 years of employment as a software developer
Doctor of Philosophy (Ph.D.), Applied Science, Doctor of Philosophy (Ph.D.), Applied Science at University of California, DavisUniversity of California San Diego
Spanish
Github Skills (46)
toolbox10
fortran10
hpc10
earth10
snl-applications10
exascale10
earth-science10
cpp10
modeling10
linked-data9
semantic-web9
cross-validation9
schema9
shacl9
shex9
Programming languages (8)
Github contributions (5)
AMBRS-project/ambrs
Jun 2024 - Jul 2026
A Python module for studying aerosol models using perturbed parameter ensembles
Contributions:13 reviews, 10 PRs, 69 pushes in 2 years
python-modules
eagles-project/haero
Aug 2020 - Jan 2023
A toolbox for constructing performance portable aerosol packages
Contributions:54 reviews, 1019 commits, 71 PRs in 2 years 5 months
toolboxperformanceaerosolportable
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