## [High Performance Computing](/stockpile-science/high-performance-computing) # High-Performance Computing ## What We Do We are global leaders in high-performance computing (HPC) enabled by our powerful and efficient modeling and simulation ecosphere that integrates multiphysics models, cognitive simulation, multiscale modeling, and advanced computing architectures. ## Meet Our People ![Brian Ryujin portrait](https://sd.llnl.gov/sites/sd/files/2022-04/brian-ryujin.jpg "Brian Ryujin-portrait.jpg") Brian Ryujin Computer Scientist “When I started here, I was struck by our community’s expertise and excited by the collaborative environment. I am thankful for the generosity of my colleagues, who have fostered my growth with their experience and knowledge. It is satisfying to be both teacher and student, growing together as we continually prepare for our next challenge.” ![Jane Herriman portrait](https://sd.llnl.gov/sites/sd/files/2022-04/jane-herriman.jpg "jane-herriman-portrait.jpg") Jane Herriman Livermore Computing Consultant “I like working at LLNL because of the opportunities for growth. I feel the Lab is willing to invest in me to help increase my impact over time, and I see many different directions my career could go.” ![Adam Bertsch portrait](https://sd.llnl.gov/sites/sd/files/2022-04/adam-bertsch_1.jpg "adam-bertsch-portrait.jpg") Adam Bertsch Principal HPC Strategist “We are perennially fielding some of the fastest computers in the world here at the Lab, but that isn’t what enables our success. The drive to understand and deliver on our mission—expressed by everyone I work with—is the key to our success, and it’s what energizes me at work every day.” ## Join Our Team ## Join Our Team [Apply Today](https://www.llnl.gov/join-our-team/careers/find-your-job/weaponsandcomplexinteg) [Apply Today](https://www.llnl.gov/join-our-team/careers/find-your-job/weaponsandcomplexinteg) ## Making Our Mark Through Game-Changing Projects ### Powering a new era of computational science LLNL has deployed El Capitan, the National Nuclear Security Administration’s first exascale supercomputer, capable of performing more than 1018 calculations per second. With unprecedented speed and scale, El Capitan supports high-fidelity, 3D simulations that advance mission areas such as stockpile stewardship, weapons modernization, and advanced manufacturing. [Learn more](https://www.llnl.gov/news/llnl-and-hpe-partner-amd-el-capitan-projected-worlds-fastest-supercomputer) ![3D Illustration of El Capitan server room](https://sd.llnl.gov/sites/sd/files/2022-04/el-capitan.jpg "el-capitan.jpg") ### Developing multiphysics simulation capabilities for next-gen computing To meet the challenge posed by exascale computing, LLNL is developing next-generation multiphysics simulation capabilities for national security applications under the [Multiphysics on Advanced Platforms Project (MAPP)](https://computing.llnl.gov/projects/mapp "Multiphysics on Advanced Platforms Project "). Developing multiphysics codes capable of meeting NNSA’s various simulation needs is a daunting task. So too is developing these codes to support robust and accurate simulation workflows with increased automation and enable innovations such as machine learning and artificial intelligence to be easily explored and incorporated, all while scaling to pre-exascale and exascale computers. To accomplish this ambitious goal, we have embraced two key themes: use of high-order numerical methods and a modular approach to code development. [Learn more](https://computing.llnl.gov/projects/mapp) ![computer simulation image](https://sd.llnl.gov/sites/sd/files/2022-04/mask_group_57.jpg "mask_group_57.jpg") ### Maximizing modern scientific throughput Flux, a next-generation workload management software framework for supercomputing, provides innovative solutions for modern workflows for many scientific and engineering disciplines, including stockpile stewardship activities, engineering and design optimization, and large artificial intelligence workflows. [Learn more](https://flux-framework.org/) ![Flux simulation image](https://sd.llnl.gov/sites/sd/files/2022-04/flux-image_0.jpg "flux-image.jpg") ## Specialized Software Explore some of the integrated codes and libraries that enable SD to deliver on its stockpile stewardship mission, while simultaneously advancing discoveries in HPC. ![icon of monitor screen with cube surrounded by 6 arcs with lines representing text on the right](https://sd.llnl.gov/sites/sd/files/styles/scaled_300w/public/2022-09/icon-simulation-software.png?itok=vFAVyuhP "icon-simulation-software") [Proprietary Software](https://sd.llnl.gov/stockpile-science/high-performance-computing/proprietary-software) ![Circle with a key hole shape](https://sd.llnl.gov/sites/sd/files/styles/scaled_300w/public/2022-09/icon-open-source-software.png?itok=0BpLvdPk "icon-open-source-software.png") [Open-Source Software](https://sd.llnl.gov/stockpile-science/high-performance-computing/open-source-software) ## State-of-the-Art Computing Facilities LLNL houses many impressive supercomputers including Sierra, and soon, El Capitan. ![large room filled with rows of servers that make up Sierra](https://sd.llnl.gov/sites/sd/files/2022-08/sierra-image.jpg) Sierra ![Photo of El Capitan server room](https://sd.llnl.gov/sites/sd/files/2022-04/el-capitan-zoomed-in.jpg) El Capitan [Explore SD's Computing Facilities](https://sd.llnl.gov/facilities/computing-facilities)