Center for Computing Research (CCR)

Center for Computing Research

Christopher Siefert (Chris)

Christopher Siefert (Chris)
Scalable Algorithms
Phone: 505/844-4696
Fax: 505/844-0918

Mailing address:
Sandia National Laboratories
P.O. Box 5800, MS 1322
Albuquerque, NM

Chris Siefert is a Senior R&D Staff Member in the Computational Multiphysics group at Sandia National Laboratories.  His research interests include preconditioners and linear solvers, algebraic multigrid, extended finite elements (XFEM) and discretization techniques for computational electromagnetics.  Chris is a member of the Trilinos team and works on MueLu/ML, Ifpack2/Ifpack and Tpetra/Epetra.  He is also a member of the ALEGRA team.


Chris' main Sandia website can be found at:


  • Ph.D., Computer Science w/ Computational Science and Engineering Option,  University of Illinois at Urbana-Champaign, 2006.
  • B.S., Computer Science and Mathematics, College of William and Mary, 2000.



Selected Publications & Presentations

  • Hu, Jonathan J., Christian Alexander Glusa, Stan Gerald Moore, Paul Lin, Edward Geoffrey Phillips, Matthew Tyler Bettencourt, James Elliott, Christopher Siefert, Sivasankaran Rajamanickam, "Linear Solvers for Plasma Simulations on Advanced Architectures," Conference Paper, SIAM Conference on Parallel Processing in Seattle, WA, USA, February 2020.
  • Siefert, Christopher, "Machine Learning for Linear Solvers," Presentation, Sandia Machine Learning and Deep Learning Workshop, August 2019.
  • Becker, Gauthier, Christopher Siefert, Raymond S. Tuminaro, Huafei Sun, Dakshina Valiveti, Aruna Mohan, Jichao Yin, Hao Huang, "High resolution viscous gingering simulation in miscible displacement using a p-adaptive discontinuous Galerkin method with algebraic multigrid preconditioner," Journal Article, Journal of Computational Physics, Vol. 374, No. 1, pp. 495–514, Accepted/Published December 2018.
  • Siefert, Christopher, Logan Meredith, Duncan Alisdair Odum McGregor, "Computation of Derived Variables for the Eddy Current Maxwell’s Equations," Presentation, SIAM CSE 2017, February 2017.
  • Siefert, Christopher, Richard Michael Jack Kramer, Pavel B. Bochev, Thomas E. Voth, "Extended and Conformal Decomposition Finite Elements for 3D Compatible Discretizations," Presentation, SIAM CSE 2015, March 2015.
  • Kramer, Richard, Pavel Bochev, Christopher Siefert, Thomas Voth, "Algebraically constrained extended edge element method (eXFEM-AC) for resolution of multi-material cells," Journal Article, Journal of Computational Physics, Vol. 276, pp. 596–612, Accepted/Published November 2014.
  • Lin, Paul, Matthew Tyler Bettencourt, Stefan P. Domino, Travis C. Fisher, Mark Frederick Hoemmen, Jonathan J. Hu, Eric T. Phipps, Andrey Prokopenko, Sivasankaran Rajamanickam, Christopher Siefert, Eric Christopher Cyr, Stephen Ray Kennon, "Towards extreme-scale simulations with next-generation Trilinos: a low Mach fluid application case study ," Conference Paper, Workshop on Large-Scale Parallel Processing/28th IEEE International Parallel & Distributed Processing Symposium (IPDPS2014), May 2014.
  • Siefert, Chris, Raymond S. Tuminaro, Axel Gerstenberger, Guglielmo Scovazzi, Samuel Scott Collis, "Algebraic Multigrid techniques for Discontinuous Galerkin Methods with varying polynomial order," Journal Article, Computational Geosciences, Accepted/Published August 2014.
  • Bochev, Pavel B., Kara J. Peterson, Christopher Siefert, "Analysis and Computation of Compatible Least-Squares Methods for Div-Curl Equations," Journal Article, SIAM Journal on Numerical Analysis, Vol. 49, No. 1, pp. 159–181, Accepted/Published February 2011.
  • Hu, Jonathan J, Jeremie Gaidamour, Axel Gerstenberger, Chris Siefert, Ray Tuminaro, Tobias Wiesner, "MueLu: A Framework for Developing Scalable Multigrid Preconditioners ," Presentation, SuperComputing 2011, November 2011.
  • Siefert, Christopher M, Pavel B Bochev, Kara J Peterson, "Multigrid Scalability for Least Squares Finite Element Problems," Poster, SIAM Parallel Processing 2010, February 2010.
  • Siefert, Christopher M, Eric de Sturler, "Probing Methods for Saddle-Point problems," Journal Article, Electonic Transactions in Numerical Analysis, Vol. 22, pp. 163–183, Accepted/Published April 2006.

Awards & Recognition

  • Siefert, Christopher M, Society/Professional Leadership, Chair of the SIAM Professional Development Working Group, SIAM, January 1, 2013 – December 31, 2013.