Wayne Joubert is currently a Computational Scientist in the Scientific Computing Group at the National Center for Computational Sciences at Oak Ridge National Laboratory. He has previously served as Technical Staff Member at Los Alamos National Laboratory, Computer Scientist at LizardTech, Inc., Computer Scientist at Xiylon Software, and Computational Scientist at the U.S. Army Engineer Research and Development Center.

Joubert specializes in the development of mathematical methods, algorithms and software to help researchers solve science problems more quickly and effectively on advanced computer systems. He is task lead for scientific library readiness for the ORNL Summit system. As member of the Center for Accelerated Application Readiness he developed the GPU-enabled Sn sweep code for the Denovo radiation transport application and was also part of the Summit application readiness team for the GTC fusion code. He is primary author of the Gordon Bell Award-winning CoMet comparative genomics code, world’s first science application to achieve ExaOp performance. His activities include mathematical algorithm development, mapping of algorithms to advanced computing hardware, application performance modeling and prediction, application readiness for future leadership systems, application requirements gathering, procurement support and acceptance testing of leadership-class systems. Previously he was developer of the LAMG algebraic multigrid solver code used by the LANL ASC program, developed linear solver algorithms and software for the R&D 100 Award-winning Falcon reservoir simulation code, and developed innovative Krylov solver methods and preconditioners for parallel computing systems.

Joubert earned his Ph.D in Mathematics at the University of Texas at Austin.


University of Texas
Doctor of Philosophy (Ph.D.)
University of Louisiana
Bachelor of Science (B.S.)

R&D Activities Contributions

Center for Accelerated Application Readiness (CAAR) - In preparation for next-generation supercomputer Summit, the Oak Ridge Leadership Computing Facility (OLCF) selected 13 partnership projects into its Center for Accelerated Application Readiness (CAAR)…


2018 — First ExaOp (mixed precision Exascale) calculation by an application, CoMet, June 2018

2018 — ORNL Awards Night, Research Accomplishment and Director's Award, CoMet application

2018 — Gordon Bell Winner, CoMet Application

2008 — Who's Who in America

1998 — Computer World Smithsonian Award, Falcon Project

2015 — ORNL Significant Event Award, Summit Acquisition Project

2015 — CUG Best Paper Award

2015 — Gordon Bell Finalist, uDeviceX Project

2014 — ORNL Awards Night, Research Accomplishment, Westinghouse AP1000 Simulation

2013 — ORNL Significant Event Award, Titan Application Readiness

2012 — ORNL CCSD Distinguished Employee Award

2009 — ORNL Significant Event Award, Jaguar Acceptance

1997 — R&D 100 Award, Falcon Project

1996 — Mathematics collaborations: Erdos number 2 ( Erdos > Faber > Joubert )

1996 — LANL IPO Excellence in Industrial Partnerships Award, Falcon Project