- My full Curriculum Vitae.

## Education

** Ph.D., Computer Science**, May 2005

University of Illinois at Urbana-Champaign, Urbana, IL.

Completed Computational Science and Engineering (CSE) degree option, demonstrating proficiency in numerical computation.

Dissertation: The Iterative Solution of a Sequence of Linear Systems Arising From Nonlinear Finite Element Analysis.

Committee: Eric de Sturler (Computer Science, Committee Chair), Michael T. Heath (Computer Science), Paul E. Saylor (Computer Science), Keith D. Hjelmstad (Civil and Environmental Engineering).

**M.S., Computer Science**, May 2000

Virginia Polytechnic Institute and State University (Virginia Tech), Blacksburg, VA.

Thesis: Efficient Numeric Computation of a Phase Diagram in Biased Diffusion of Two Species.

Committee: Calvin J. Ribbens (Computer Science, Committee Chair), Donald Allison (Computer Science), Royce K. P. Zia (Physics), Beate Schmittmann (Physics).

**B.S., Computer Science**, Summa Cum Laude, May 1998**B.S., Physics**, Summa Cum Laude, In Honors, May 1998**Minor, Mathematics**, May 1998

Virginia Polytechnic Institute and State University (Virginia Tech), Blacksburg, VA.

Honors Thesis (Physics): The Construction and Analysis of Factorial Experiments: Application to Tribochemical Vapor Deposition.

Committee: Jimmy Ritter (Physics, Committee Chair), Beate Schmittmann (Physics), Jerome Long (Physics).

## Research and Technical Experience

2014-Present | Manager, Computational Mathematics Dept., Sandia National Laboratories. |

2013-2014 | Acting Manager, Computational Mathematics Dept., Sandia National Laboratories. |

2013-2014 | Principal Member of the Technical Staff, Sandia National Laboratories.For my current research interests, see my research page. |

2007-2013 | Senior Member of the Technical Staff, Sandia National Laboratories. |

2004-2007 | Postdoctoral Employee, Sandia National Laboratories.Conducted research in multiscale modeling and analysis. |

2001-2004 | Research Assistant, Dept. of Computer Science, University of Illinois.Developed new solvers and preconditioners for ill-conditioned sparse linear systems. |

Summer 1998 | Applications Programmer, Dept. of Physics, Virginia Tech.Constructed custom interactive laboratory software for use in undergraduate physics labs. |

1996-1997 | Research Assistant, Dept. of Physics, Virginia Tech.Developed software to drive experimental apparatus; Aided in experiment design, data collection, and analysis. |

## Teaching Experience

Summer 1999 | Instructor, Dept. of Computer Science, Virginia TechTaught Object-Oriented Software Design and Construction course (60 students). Managed teaching assistants. Prepared lectures, homework, programming assignments, and exams |

Fall 2000 | Teaching Assistant, Dept. of Computer Science, University of Illinois.Graded assignments and exams, held office hours. Assisted with Programming Languages and Compilers course (300 students). |

1998-2000 | Teaching Assistant, Dept. of Computer Science, Virginia Tech.Graded assignments and exams, held office hours, and taught lab sections. Assisted with Object-Oriented Software Design and Construction and Numerical Methods courses. |

## Research Awards

2010 | Sandia Employee Recognition AwardReceived for creating the PDLAMMPS code. |

2009 | Sandia Employee Recognition AwardReceived for technical work on Sandia project Peridynamics as a Rigorous Coarse-Graining of Atomistics for Multiscale Materials Design. |

2008 | Sandia Award for ExcellenceReceived for technical and programmatic leadership in multiscale simulation. |

## Teaching Awards

2000 | Outstanding Graduate Teaching AwardDepartment of Computer Science, Virginia Tech. |

## Service Awards

2021 | Sandia Award for ExcellenceFor outstanding leadership and professionalism in handling the additional management responsibilities during the COVID-19 pandemic. |

2016 | Sandia Award for ExcellenceReceived for exceptional leadership and programmatic service. |

2016 | Sandia Center for Computing Research Exceptional Service AwardReceived for organizing an outstanding experience for CCR’s 2016 summer interns. |

2006 | Sandia Award for ExcellenceReceived for organizing CSRI-NECIS special seminar series on predictive science for nanotechnology. |

## Fellowships and Scholarships

2003-2004 | Computational Science and Engineering Fellow, University of Illinois, (10 awarded per year).Received for work on robust preconditioners and solvers for ill-conditioned equations from nonlinear finite element analysis. |

2002-2003 | Computational Science and Engineering Fellow, University of Illinois, (10 awarded per year).Received for work on robust preconditioners and solvers for ill-conditioned equations from nonlinear finite element analysis. |

1997-1998 | Barry M. Goldwater Scholar, (300 awarded nationally per year). |

## Honor Societies

1997 | Phi Beta Kappa, Mu of Virginia. |

1997 | Upsilon Pi Epsilon, the International Honor Society for the Computing and Information Disciplines. |

1997 | Sigma Pi Sigma, the National Physics Honor Society. |

## Publications

Please see my publications page.

## Presentations

Please see my presentations page.

## Software

Please see my software page.

## Students

Cory Wright | I supervised Cory during the 2017 Sandia CCR summer student program, and also for the spring semester of 2018. During this time, Cory performed mathematical analysis of various discretizations of peridynamics. |

Payton Lindsay | With Arun Prakash, Payton’s Ph.D. advisor at Purdue, I co-supervised Payton from 2013-2016, including summers Payton spent at Sandia as a summer student intern. During this time, Payton developed the first multi-time-stepping method for a nonlocal model, peridynamics. I also served as a member of Payton’s Ph.D. committee. |

Canio Hoffarth | With Dave Littlewood, I co-supervised Canio Hoffarth during the 2012 Sandia CSRI summer student program. During this time, Canio conducted numerical simulations of compaction of granular material using the peridynamic code Peridigm. Canio also developed and implemented several capabilities into Peridigm, including new compute classes, a new contact algorithm incorporating friction, and useful post-processing tools. |

Kirk Soodhalter | I supervised Kirk Soodhalter during the 2011 Sandia CSRI summer student program. During this time, Kirk developed and implemented a block version of the Krylov subspace recycling solver GCRODR within Trilinos, and tested it in the fluid-DFT code Tramonto. |

Kapil Ahuja | I supervised Kapil Ahuja during the 2010 Sandia CSRI summer student program. During this time, Kapil applied Krylov subspace recycling solvers to climate modeling and uncertainty quantification applications. |

Pablo Seleson | I supervised Pablo Seleson during the 2008 Sandia CSRI summer student program. I continued my collaborations with Pablo after his visit, and was a member of his Ph.D. committee, chaired by Prof. Max Gunzburger. Pablo won the student paper prize at the 33rd SIAM Southeastern-Atlantic Section Conference for our joint paper, Peridynamics as an Upscaling of Molecular Dynamics. Pablo graduated from the Dept. of Scientific Computing at Florida State University in 2010. |

## Professional Society Memberships

**Society for Industrial and Applied Mathematics** (SIAM).**U.S. Association for Computational Mechanics** (USACM).

## Professional Service Activities

2019 – Present | Member, WNA Resource Advisory Panel (WRAP). |

2018 – Present | Member, Editorial Board, Journal of Peridynamics and Nonlocal Modeling. |

2015 – Present | Associate Editor, SIAM Journal on Numerical Analysis. |

2023 | Member, Organizing Committee, 17th U.S. National Congress on Computational Mechanics, Albuquerque, New Mexico, July 23-27 2023. Congress Chairs: Joe Bishop (SNL), Jim Stewart (SNL). |

2022 | Member, Scientific Committee, USACM Thematic Conference on Uncertainty Quantification for Machine Learning Integrated Physics Modeling (MLIP), Crystal City, Arlington, Virginia, August 18-19, 2022. |

2008 – 2018 | Associate Editor, Applied Mathematics and Computation. |

2021 | Minisymposium Co-organizer, Mechanistic Machine Learning and Digital Twins for Computational Science, Engineering and Technology (MMLDT-CSET). Organized minisymposium with Petronela Radu (University of Nebraska-Lincoln) and Animesh Biswas (University of Nebraska-Lincoln)on Nonlocal Operators and Machine Learning in Multiscale Modeling. |

2021 | Minisymposium Co-organizer, 16th U.S. National Congress on Computational Mechanics. Organized minisymposium with Petronela Radu (University of Nebraska-Lincoln) and Animesh Biswas (University of Nebraska-Lincoln) on Nonlocal Models in Continuum Mechanics: Mathematical, Computational, Machine Learning Aspects.. |

2017 | Member, Organizing Committee, 2017 ASCR Applied Mathematics Principal Investigators Meeting with Jeff Hittinger (co-chair, LLNL), Lois Curfman McInnes, (co-chair, ANL), Abani Patra (SUNY Buffalo), Nathan Baker (PNNL), Miranda Holmes-Cerfon (NYU), Barney Maccabe (ORNL), Esmond Ng (LBNL), Pieter Swart (LANL), and Karen Willcox (MIT). |

2015 | Workshop Co-organizer, Workshop on Nonlocal Models in Mathematics, Computation, Science, and Engineering at Oak Ridge National Laboratory with Pablo Seleson (Oak Ridge National Laboratory), Clayton Webster (Oak Ridge National Laboratory), and Tadele Mengesha (U. Tennessee). |

2015 | Minisymposium Co-organizer, 1st Pan-American Conference on Computational Mechanics. Organized minisymposium with Pablo Seleson (Oak Ridge National Laboratory) and Diego Del-Castillo-Negrete (Oak Ridge National Laboratory) on Nonlocal Models for Mechanics and Diffusion. |

2013 | Minisymposium Co-organizer, 2013 SIAM Conference on Analysis of Partial Differential Equations. Organized minisymposium with Petronela Radu (U. Nebraska) on Nonlocal Models in PDEs and Applications. |

2012 | Minisymposium Co-organizer, 10th World Congress on Computational Mechanics. Organized minisymposium with Pablo Seleson (U. Texas) and Serge Prudhomme (U. Texas) on Mathematical and Computational Analysis of Concurrent Methods for Multiscale Material Modeling. |

2011 | Minisymposium Co-organizer, 11th US Congress on Computational Mechanics. Organized minisymposium with Pablo Seleson (U. Texas), Mitchell Luskin (U. Minnesota), and Serge Prudhomme (U. Texas) on Mathematical Modeling and Analysis for Multiscale Materials. |

2011 | Minisymposium Co-organizer, 11th US Congress on Computational Mechanics. Organized minisymposium with David Littlewood, Jay Foulk and Alejandro Mota (Sandia National Laboratories) on Recent Advances in Nonlocal Computational Mechanics. |

2010 | Minisymposium Co-organizer, 2010 SIAM Conference on Mathematical Aspects of Materials Science.Organized minisymposium with Burak Aksoylu (TOBB University) on Analytical and Numerical Methods for Nonlocal Problems. |

2010 | Minisymposium Co-organizer, 16th US National Congress on Theoretical and Applied Mechanics (USNCTAM).Organized minisymposium with Stewart Silling (Sandia), Youping Chen (U. Florida), and Xiantao Li (Penn State) on Theoretical and Computational Methods for Critical Material Behavior. |

2007 | Editor, Sandia CSRI Summer Proceedings.Edited (with Scott Collis) the proceedings from the annual summer internship program at Sandia’s Computer Science Research Institute (CSRI). |

2007 | Seminar Series Organizer, Sandia CSRI seminar series.Hosted Sandia staff and university faculty for talks on computational science and applications. |

2006 | Seminar Series Organizer, Sandia NECIS special seminar series.Hosted university faculty for talks on predictive science for nanotechnology. |

Ongoing | Reviewer.Reviewer for SIAM Review (SIREV), SIAM Journal on Scientific Computing (SISC), SIAM Journal on Numerical Analysis (SINUM), Multiscale Modeling and Simulation (MMS), Computer Methods in Applied Mechanics and Engineering (CMAME), Journal of Computational Physics (JCP), Electronic Transactions on Numerical Analysis (ETNA), Discrete and Continuous Dynamical Systems, Journal of Computational Mathematics, Applied Mathematics and Computation, IEEE Transactions on Computer-Aided Design of Integrated Circuits and Systems, European Journal of Mechanics – A/Solids, Journal of Mechanics of Materials and Structures (JoMMS), Computational Materials Science, Microfluidics and Nanofluidics. |

## Academic Biographical Data

My academic ancestry, computed with data from the Mathematics Genealogy Project, using Dave Alber’s Mathematics Genealogy Grapher.

I have an Erdös number of 3. You can compute your Erdös number (or your collaboration distance to anyone else) here.