Youngsoo Choi

Portrait of  Youngsoo Choi
  • Title
    Research Scientist Staff
  • Email
    choi15@llnl.gov
  • Phone
    (925) 422-0217
  • Organization
    Not Available

ORCID: here, Google Scholar: here

Are you interested in collaboration? Please do not hesitate emailing Youngsoo!

Youngsoo is a staff scientist at LLNL’s CASC group, where he develops efficient foundation models for computational science. His research focuses on creating surrogates and reduced-order models to accelerate time-critical simulations in areas such as inverse problems, design optimization, and uncertainty quantification. He has pioneered advanced ROM techniques—including machine learning-based nonlinear manifolds, space-time ROMs, component-wise ROM optimization, and latent space dynamics identification—and currently leads the libROM team in data-driven surrogate modeling. His contributions extend to open source projects such as libROM, pylibROM, LaghosROM, ScaleupROM, LaSDI, WLaSDI, tLaSDI, gLaSDI, NM-ROM, DD-NM-ROM, and GappyAE. Youngsoo earned his BS from Cornell and his PhD from Stanford, and he was a postdoc at Sandia National Laboratories and Stanford University before joining LLNL in 2017.

YouTube/Virtual Conference/Seminar Talks [Recorded Videos]

libROM Tutorial Videos

Open-source codes

Research Interests

Patent

Upcoming Presentations

Presentations

PostDoc., Sandia National Laboratories, Livermore, CA, 2015 – 2017

PostDoc., Farhat Research Group, Stanford, CA, 2013 – 2015

Ph.D., Computational and mathematical engineering, Stanford University, 2013

B.S., Civil and environmental engineering, Cornell University, 2007

A.S., Engineering, Montgomery County Community College, 2004

  • Director's Science and Technology Excellence in Publication Award at LLNL in 2023
  • Best Instructor Award from the AHPCRC summer institute at Stanford University in 2015
  • Dean’s Office Award for the Stanford Opportunity Job Fair Research Poster in 2013
  • Best Instructor Award from the AHPCRC summer institute at Stanford University in 2011
  • Best Paper Award from the Society for Risk Analysis in 2010
  • Recipient of Stanford ICME Ph.D Fellowship in 2007
  • Elaine and Herman Blumenthal Award for Academic Excellence
  • The Mathematics Faculty Award for Excellence
  • CRLA Regular Tutoring Certificate
  • A member of Phi Theta Kappa Honor Society
  • A member of Golden Key Honor Society
  • A member of Tau Beta Pi Engineering Honor Society