James R. Stewart

Computing Research

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Computing Research


(505) 844-8630

Sandia National Laboratories, New Mexico
P.O. Box 5800
Albuquerque, NM 87185-1318


Since March 2022, Jim has served as the Acting Director of Sandia’s Center for Computing Research. From 2017-2022, he served as the Senior Manager of the Computational Sciences and Math Group, and previously served as Manager of the Optimization and Uncertainty Quantification Department and the Advanced Computational Mechanics Architectures Department. Jim is Sandia’s lead for the DOE Office of Science Advanced Scientific Computing Research (ASCR) program, which includes programmatic responsibility for Sandia’s Exascale Computing Project (ECP). He also leads Sandia’s Advanced Technology Development and Mitigation (ATDM) subprogram, which is part of DOE’s Advanced Simulation and Computing (ASC) program for stockpile stewardship. He has led major software development teams including the Dakota optimization and uncertainty quantification toolkit team, as well as the SIERRA computational mechanics framework team. 


Jim holds a Ph.D. in Mechanical Engineering from Stanford University and B.S. and M.S. degrees in Mechanical Engineering from the University of Illinois at Urbana-Champaign. He has previous experience at NASA Langley Research Center and joined Sandia after a short stint at Object Reservoir, Inc., a start-up company in Austin, TX focused on reservoir modeling. He has served on the Executive Council of the U.S. Association for Computational Mechanics (USACM) and chaired the USACM Technical Thrust Area on Uncertainty Quantification & Probabilistic Modeling from 2015-2020. Jim was named USACM Fellow in 2021.


James Stewart, (2021). Data-Driven Modeling and the Big Data Problems https://doi.org/10.2172/1888961 Publication ID: 75864

James Stewart, (2019). Sandia National Laboratories Five Most Impactful ASCR Research Investments https://www.osti.gov/biblio/1645453 Publication ID: 69335

James Stewart, (2019). Optimization Under Uncertainty for Design Materials and Large-Scale Computing https://www.osti.gov/servlets/purl/1644485 Publication ID: 67379

James Stewart, (2019). Optimization Under Uncertainty for Predicting Properties and Performance https://www.osti.gov/servlets/purl/1592585 Publication ID: 64328

James Stewart, (2018). Sandia’s Exascale Computing Project https://www.osti.gov/servlets/purl/1592313 Publication ID: 59100

James Stewart, (2018). Computational Mechanics R&D Opportunities at Sandia https://www.osti.gov/servlets/purl/1806532 Publication ID: 63306

James Stewart, (2018). Computational Sciences and Math at Sandia — Algorithms Software and Applications https://www.osti.gov/servlets/purl/1806533 Publication ID: 63307

Francesco Rizzi, Eric Phipps, David Hollman, Jonathan Lifflander, Jeremiah Wilke, Aram Markosyan, Hemanth Kolla, Nicole Slattengren, Keita Teranishi, James Stewart, Robert Clay, Janine Bennett, (2017). Tackling UQ in DARMA a Programming Model for Task-Based Execution at Extreme-Scale https://www.osti.gov/servlets/purl/1507896 Publication ID: 57490

James Stewart, (2017). USACM Thematic Workshop On Uncertainty Quantification And Data-Driven Modeling https://doi.org/10.2172/1367419 Publication ID: 56240

James Stewart, (2016). Science-Based Computational Modeling: New Questions New Challenges and Big Data Problems https://www.osti.gov/servlets/purl/1618233 Publication ID: 49138

James Stewart, (2014). Introduction & Overview UQ Challenge Benchmarks https://www.osti.gov/servlets/purl/1141773 Publication ID: 40215

James Stewart, (2013). 2013 Dakota releases provide users an array of new features https://www.osti.gov/servlets/purl/1675176 Publication ID: 31775

Allen Robinson, Sharon Petney, Richard Drake, V. Weirs, Brian Adams, Dena Vigil, John Carpenter, Christopher Garasi, Michael Wong, Joshua Robbins, Christopher Siefert, Otto Strack, Ann Wills, Timothy Trucano, Pavel Bochev, Randall Summers, James Stewart, Curtis Ober, William Rider, Thomas Haill, Raymond Lemke, Kyle Cochrane, Michael Desjarlais, Edward Love, Thomas Voth, Stewart Mosso, John Niederhaus, (2013). ALEGRA Update: Modernization and Resilience Progress https://www.osti.gov/servlets/purl/1115141 Publication ID: 35790

James Stewart, (2012). A V&V/UQ Framework for Science-Based Predictions https://www.osti.gov/servlets/purl/1116373 Publication ID: 30235

James Stewart, (2012). VUQ Focus Area https://www.osti.gov/servlets/purl/1113291 Publication ID: 25748

James Stewart, (2011). NEAMS VU Overview https://www.osti.gov/servlets/purl/1118561 Publication ID: 25031

James Stewart, (2011). Simulation Based Predictive Science https://www.osti.gov/servlets/purl/1118545 Publication ID: 24779

James Stewart, (2009). NEAMS VU Verification Validation Uncertainty Quantification https://www.osti.gov/servlets/purl/1141811 Publication ID: 16874

James Stewart, (2009). Verification Methods and NRC Regulations: A Brief Overview https://www.osti.gov/servlets/purl/1142223 Publication ID: 16882

James Stewart, (2009). NEAMS: Overview of Verification https://www.osti.gov/servlets/purl/1696871 Publication ID: 15987

James Stewart, (2009). Verification Validation Uncertainty Quantification Predictive Modeling and Simulation: Integration of NW Capabilities into NEAMS https://www.osti.gov/servlets/purl/1698321 Publication ID: 15711

James Stewart, (2008). UQ methods in DAKOTA employed by NuGET team to achieve critical QMU milestone https://www.osti.gov/servlets/purl/1710295 Publication ID: 13496

James Stewart, Samuel Collis, (2007). Copy of Collaboration Opportunities with Sandia National Laboratories’ Computer Science Research Institute (CSRI) https://www.osti.gov/servlets/purl/1147373 Publication ID: 10640

James Stewart, (2007). Stewart Grad Education Sessions https://www.osti.gov/servlets/purl/1143354 Publication ID: 8976

James Stewart, (2007). SNL Perspectives on Petascale Environments https://www.osti.gov/servlets/purl/1143301 Publication ID: 8995

Michael Eldred, James Stewart, (2006). Solution Verification and Uncertainty Quantification Coupled https://www.osti.gov/servlets/purl/1724649 Publication ID: 8211

James Stewart, (2004). Solution verification for explicit transient dynamics problems in the presence of hourglass and contact forces Proposed for publication in Computer Methods in Applied Mechanics and Engineering Journal. https://www.osti.gov/biblio/964541 Publication ID: 3785

James Stewart, James Stewart, (2003). SIERRA Framework Version 3: Master Element Subsystem https://doi.org/10.2172/809987 Publication ID: 1792

James Stewart, James Stewart, (2003). SIERRA Framework Version 3: Transfer Services Design and Use https://doi.org/10.2172/811716 Publication ID: 1719

James Stewart, James Stewart, Harold Edwards, (2002). SIERRA Framework Version 3: h-Adaptivity Design and Use https://doi.org/10.2172/808601 Publication ID: 1635

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