Sachin Alexander Reddy

Research positions

NASA Jet Propulsion Laboratory
Postdoctoral Fellow01/2025 –
Research Intern10/2022 – 03/2024
National Institute of Polar Research (国立極地研究所)
Postdoctoral Associate06/2024 – 10/2024
Postdoctoral Fellow03/2024 – 05/2024

Education

University College London
PhD in Space Physics07/2020 – 03/2024
MSc in Systems Engineering (Valedictorian)09/2018 – 09/2019
Caltech
Visiting Scholar in Planetary Science10/2022 – 03/2024
Oxford Brookes University
BSc in Computer Science & Business09/2010 – 06/2015

Skills

ML / Modeling: Transformers, GNNs, LSTMs, ensemble methods; uncertainty quantification; explainable AI (SHAP); emulators / surrogates for physical simulation.

Frameworks: PyTorch, TensorFlow, JAX (learning), scikit-learn, NumPy, SciPy.

Workflow: Spec-driven and agentic development; HPC (NASA Pleiades / JPL clusters); Git, Python, Bash, Julia (learning), LaTeX.

Domain: Plasma physics, electromagnetism, fluid dynamics, satellite time-series, planetary environments.

Select publications

submitted Reddy, S. A., Azari, A., Cochrane, C., Jia, X., Nordheim, T., Harris, C., Mandrake, L., Vance, S. and Ciuca, I. LEAP: A Rapid Neural Surrogate of Multi-Fluid MHD at Europa. Nature Comms AI & Computing.

submitted Reddy, S. A., Kataoka, R., Nakano, S., Fujita, S., Nakamizo, A. and Pulkkinen, A. Predicting AMPERE Field Aligned Currents with a Long Short Term Memory Model. JGR: Machine Learning and Computation.

2025 Reddy, S. A., Pi, X., Forsyth, C., Aruliah, A. and Smith, A. Predictions of Equatorial Vertical Plasma Drift Using a Neural Network Model. JGR: Earth and Space Science.

2024 Reddy, S. A., Nordheim, T. A. and Harris, C. Surface Charging of Jupiter's Moon Europa. The Astrophysical Journal Letters. 962(2), L29.

2023 Reddy, S. A., Forsyth, C., Aruliah, A., Smith, A., Bortnik, J., Aa, E., Kataria, D. and Lewis, G. Predicting Swarm Equatorial Plasma Bubbles via Machine Learning and Shapley Values. JGR: Space Physics. 128, e2022JA031183. (Wiley Top Viewed Article 2023.)

Additional first-author works on publications and Google Scholar.

Select talks

UC Berkeley (Lunchtime Seminar); MIT (Science Seminar); NASA Ames (Science Seminar); UCLA (Space Physics Seminar); JAXA (Space Plasmas Seminar); NASA JPL (Program Seminar, ×2); Caltech (Postdoc Launch Seminar); UCL (APEX Seminar). 20+ given over 5 years.

Funding

NASA Postdoctoral Program
Postdoctoral Fellowship — $178,0002025
Japan Society for the Promotion of Science
Postdoctoral Fellowship — $4,0002024

Honors

Wiley
Top Viewed Article in 2023 Award2025
University College London
Alan Johnstone Award for Outstanding Scientific Achievement2023
Top of Class · Best Research Project · GPA 3.9/4.0 · Valedictorian2019
UK Government
CIRCE Mission Challenge Coin Award2023

Missions

Europa Clipper
Science Affiliate09/2025 –
Medium-Class Explorer Mission Concept
Science Affiliate09/2025 –
CIRCE / SOAR / Phoenix INMS instrument
Affiliate & Mission Ops2020 – 2022

Service

JPL Model Understanding & Surrogate Committee
Co-Founder & Member2026 –
NASA Ocean Worlds Working Group
Contributor2026 –
AGU Space Physics Advocacy Committee
Member2025 –
NeurIPS · JGR Space Weather · JGR Space Physics
Reviewer2022 –

Industry

Synergy Circuits
Design Engineer — aerospace / semiconductor PCBs2018
Gorilla Circuits
Process Engineer — improved yield +4% and productivity +9%2016 – 2017