Josiah Johnston
Director Of Data Science
California, United States
Summary
👤
Senior🎓
Top SchoolJosiah Johnston is a Director of Data Science based in California with 11 years of experience blending scientific research, software engineering, and clean-energy strategy. He holds a Ph.D. in Energy & Resources from UC Berkeley and has led interdisciplinary teams building advanced models and production software for grid planning, medical imaging, and renewable-energy analytics. As a principal author of the open-source Switch 2.0 grid planning tool, he has helped shape public integrated resource planning for California and Hawaii and specializes in optimization, mathematical modeling, and AI applied to decarbonization. His background spans academia, municipal energy policy, startups, and consulting, giving him a rare combination of hands-on coding, fieldwork, and policy-facing communication. Colleagues rely on him for turning complex energy-system science into practical, auditable tools used in real-world planning processes.
11 years of coding experience
8 years of employment as a software developer
Master’s Degree, Energy and Resources, Master’s Degree, Energy and Resources at University of California, BerkeleyBS, Computer Science, BS, Computer Science at University of Arkansas
Stackoverflow
123reputation
39kreached
6answers
1question
Github Skills (119)
power-systems10
aiml10
ai-ml10
modeling-tool10
elassandra10
python9
feature-engineering9
dse9
random-forest9
parameter-tuning9
python-functions9
multiprocessing9
ampl9
memoization9
datastax9
Programming languages (8)
Github contributions (5)
josiahjohnston/SWITCH-AMPL-RAEL
Feb 2015 - Jul 2020
A fork of the SWITCH-AMPL codebase developed by the Renewable and Appropriate Energy Lab at University of California Berkeley
Contributions:20 commits, 13 pushes, 13 branches in 5 years 6 months
ampl
josiahjohnston/switch
Jul 2016 - Jul 2019
Contributions:7 pushes, 16 branches in 3 years
pythonpyomoplanninggridswitch
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