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Jong Youl Choi

Researcher, Discrete Algorithms Group, Computer Science and Mathematics Division, Oak Ridge National Laboratory

Jong Youl Choi is a researcher in the Discrete Algorithms Group of the Computer Science and Mathematics Division at Oak Ridge National Laboratory (ORNL). Choi works on data-centric machine learning algorithms, high-performance data-intensive computing and data management for large-scale scientific workflows. Choi is listed as a developer of HydraGNN, ORNL's open-source multitask graph neural network library, in both its original 2021 software record and its v5.0 release, and ORNL lists the HydraGNN v5.0 user manual among Choi's publications.1234

At a glance

Current role
Researcher, Discrete Algorithms Group, Computer Science and Mathematics Division
Sector
Government lab or agency
Education
NYU
Work listed
1
Sources cited
4
Profile reviewed

Career and research

Choi earned a PhD in computer science at Indiana University in 2012 and an MS in computer science from New York University in 2004, and works in ORNL's Discrete Algorithms Group. Choi's research spans data mining and machine learning algorithms, parallel and distributed systems, in situ and in-transit data processing, and data management for code coupling.1

Choi's recent ORNL publications include the HydraGNN v5.0 user manual (May 2026), a conference paper on multi-task parallelism for pre-training graph foundation models on multi-source atomistic data, and the lab's Data and AI Systems FY 2026 highlights report.1

Work and contributions

  • HydraGNN Open-source code

    Listed second, after Massimiliano Lupo Pasini, among the developers in the HydraGNN v5.0 citation, and a developer on the original 2021 HydraGNN software record.423

Timeline

  1. Earned an MS in computer science from New York University.1
  2. Earned a PhD in computer science at Indiana University.1
  3. Listed as a developer of HydraGNN when it was released through DOE CODE.2
  4. Listed as a developer of HydraGNN v5.0.3

Where they work

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References

4 sources · profile reviewed Oct 22, 2026 · data updated Oct 22, 2026

  1. Jong Youl Choi — ORNL staff profileOak Ridge National Laboratory · Official page · accessed Oct 22, 2026
  2. HydraGNN: Distributed PyTorch implementation of multi-headed graph convolutional neural networks (DOE CODE)U.S. Department of Energy, OSTI · Repository · published Oct 19, 2021 · accessed Oct 22, 2026
  3. HydraGNN v5.0 (DOE CODE)U.S. Department of Energy, OSTI · Repository · published May 12, 2026 · accessed Oct 22, 2026
  4. ORNL/HydraGNN README (citations)ORNL (GitHub repository) · Repository · accessed Oct 22, 2026