Quantum Computer Science. Biography I'm a staff member in Organization 1425, working in the field of quantum information and quantum computing. Current work of mine focuses predominately on optimizing tomography of quantum information processors, using a framework developed here at Sandia known as gate set tomography. I also study quantum...

# Staff Pages

## Kevin Pedretti

Scalable System Software. Biography Kevin Pedretti is a Principal Member of Technical Staff at Sandia National Laboratories. He has helped develop several large-scale parallel computers, including the Red Storm system that was productized as the Cray XT line of supercomputers and Astra, the first Petascale supercomputer based on Arm processors....

## Kurt Brian Ferreira

Scalable System Software. Biography Principal Member of Technical Staff My area of expertise is system software and resilience/fault-tolerance methods for large-scale, massively parallel, distributed-memory, scientific computing systems. I have designed and developed a number of innovative, high-performance, and resilient implementations of low-level system software for several HPC platforms including the Cray...

## Laura Painton Swiler

Computing Research. Biography Laura has worked at Sandia since 1995. She is currently a distinguished member of technical staff in the optimization and uncertainty quantification department. Laura's research interests include uncertainty quantification for computational models, calibration of model parameters, sensitivity analysis, and model selection. Laura is a developer on the...

## Luca Bertagna

Computational Science. Biography I'm interested in numerical methods for PDEs, and their efficient implementation on current and future HPC architectures. My background is in applied mathematics, including PDEs, functional analysis, numerical analysis, and HPC. I am also interested in modern software design and testing, with the goal to enhance code...

## Mark Alan Taylor

Computational Science. Biography Mark Taylor is a mathematician who specializes in numerical methods for parallel computing and geophysical flows. He currently serves as Chief Computational Scientist for the DOE's Energy Exascale Earth System Model (E3SM) project. He developed the Hamiltonian structure preserving formulation of the spectral element method used in...

## Matthew Leon Curry

Scalable System Software. Biography I have a wide variety of research interests, mostly pertaining directly to data storage in supercomputing environments: Parallel and distributed storage systemsErasure coding and fault toleranceLow-level (block or object) storage devicesHeterogeneous computing (e.g., GPUs, accelerators) Education Ph.D. in Computer Science, University of Alabama at Birmingham, under...

## Mauro Perego

Scientific Machine Learning. Biography I'm interested in mathematical, numerical and computational treatment of Partial Differential Equations (PDE) that arise from various applications, PDE constrained optimization and recently in uncertainty quantification. My favorite numerical scheme for discretizing PDEs, and the one I'm mostly experienced with, is the Galerkin finite element method....

## Michael J. Levenhagen

Scalable System Software. Biography I work in the Scalable System Software department at Sandia National Laboratories. My primary interests are designing system software for capability class high performance computing platforms and enabling co-design activities for the laboratories by designing Structural Simulation Toolkit (SST) models of computer architectures. Publications

## Michael P. Frank

Cognitive & Emerging Computing. Biography Hello, I'm currently (since Aug. 2015) a senior member of the technical staff at Sandia National Labs with a position designation of R&D S&E (Research & Development / Science & Engineering), Computer Science, with a primary appointment in the Cognitive & Emerging Computing department (1421)...

## Michael S. Eldred

Optimization & Uncertainty Quantification. Biography Mike led the DAKOTA project for 15 years (1994-2009) and now leads algorithm research activities that target new capabilities for DAKOTA. Mike's research interests include uncertainty quantification, design under uncertainty, multifidelity modeling, surrogate-based optimization, and high-performance computing, with application to stockpile stewardship and energy initiatives through NNSA and...

## Michael Wolf

Scalable Algorithms. See my expanded staff site.

## Nathaniel Albert Trask

Computational Mathematics. Biography I am a principal member of technical staff in the computational mathematics department in the Center for Computing Research at the Computer Science Research Institute at Sandia National Laboratories.My research focuses on structure preservation in scientific machine learning and novel discretizations for PDEs. I have a background...

## Nick Winovich

Scientific Machine Learning. Biography Nick's research focuses on the intersection of machine learning, probability theory, and partial differential equations with an emphasis on scientific and engineering applications. Prior to joining Sandia, he directed his research toward the construction of operator networks (neural networks designed to approximate operators rather than functions)...

## Ojas Parekh

Discrete Math & Optimization. Biography I am a theoretical computer scientist who enjoys applying mathematical techniques to practically motivated interdisciplinary problems. I have worked in a variety of fields including discrete optimization, combinatorics, combinatorial scientific computing, and most recently, quantum and neuromorphic computing. A recent passion is helping shape the emerging fields...

## Paul Allen Kuberry

Computational Mathematics. Biography Paul Kuberry received his M.S. and Ph.D. in Mathematical Sciences from Clemson University and his B.S. in Mathematics from Clarion University of Pennsylvania. His research interests include developing and analyzing algorithms and coupling methods for the solution of multi-physics partial differential equations and problems posed on domains...

## Pavel B. Bochev

Computing Research. Biography Pavel is a Senior Scientist at Sandia National Laboratories in Albuquerque where he works in the Center for Computing Research. He joined Sandia in 2000 after six years of teaching and research at the University of Texas at Arlington. Pavel’s research interests include compatible discretizations for partial...

## Peter A. Schultz

Computational Multiscale. Projects/Research interests High-performance computing in atomistic materials scienceDevelopment and application of high-performance atomistic materials simulations methods, particularly first principles quantum mechanics for extended (bulk and surface) systems.Quantum Electronic Structure Method Development: SeqQuestPrincipal architect of the QUEST suite of Gaussian-basis density functional theory (DFT) pseudopotential codes developed at Sandia,...

## Peter Andrew Bosler

Computational Science. Biography My research develops numerical methods and accompanying software for coupled multi physics problems. Most recently I have been working with projects in the climate modeling and plasma physics application areas. I have experience with vortex methods, Lagrangian particle methods, discontinuous Galerkin methods, and Lagrangian/semi-Lagrangian transport schemes. Education...

## Peter Brian Ohm

Computational Mathematics. Biography My research interests are in scientific and high performance computing with a focus on preconditioners for multiphysics PDE systems. Special interests include algebraic and geometric multigrid and block preconditioning. Education Ph.D., Mathematics - Tufts UniversityM.S., Mechanical Engineering - University of MinnesotaB.A., Mathematics and Physics - St. Olaf...

## Raymond Stephen Tuminaro

Computational Mathematics. Biography I'm interested in parallel iterative methods for linear systems, numerical linear algebra, eigenvalue problems, and parallel numerical software. Special interests in algebraic multigrid (e.g. smoothed aggregation), numerical solution of Maxwell's equations, incompressible Navier-Stokes, and block preconditioning. I have developed the Aztec iterative library as well as the...

## Richard B. Lehoucq

Discrete Math & Optimization. See my expanded staff site.

## Robert John Baraldi

Optimization & Uncertainty Quantification. Biography Bobby's research interests include: algorithms for nonsmooth and nonconvex optimization, trust region algorithms, proximal algorithms, and PDE-constrained optimization. Bobby is also contributes to Rapid Optimization Library (ROL) and RegularizedOptimization package in Julia. Education Bobby earned his B.S. in Mathematics from North Carolina State University in...

## Roger P. Pawlowski

Computational Science. Biography Principal Member of the Technical Staff in the Computational Science Department at Sandia National Laboratories. Research interests include: High performance computing and parallel algorithm development Numerical methods for multiple-time-scale nonlinear coupled PDEs Temporal and spatial discretizations of PDEs Physics applications including computational fluid dynamics, chemically reacting flows,...

## Ron A. Oldfield

Scientific Machine Learning. Biography I manage the Scalable Analysis & Visualization department at Sandia National Laboratories. I joined Sandia National Laboratories in 1992 as a student intern from the University of New Mexico. After getting my B.S. from UNM in 1993, I joined the Computational Sciences department at Sandia and...

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