Distinguished, R&D Computer Science, HPC Systems - Onsite

About the Company

Sandia National Laboratories is the nation’s premier science and engineering laboratory for national security and technology innovation. With teams of specialists focused on cutting‑edge work in a broad array of areas, our mission is to protect the country while advancing technology for the betterment of society.

• Challenging work with an amazing impact that contributes to security, peace, and freedom worldwide
• Extraordinary co‑workers
• Some of the best tools, equipment, and research facilities in the world
• Career advancement and enrichment opportunities
• Flexible work arrangements (9/80, 4/10, part‑time, telecommuting)
• Generous vacation, strong medical and other benefits, competitive 401(k), learning opportunities, relocation assistance, and amenities aimed at creating a solid work/life balance*

We are seeking an R&D S&E computational scientist/engineer to contribute to multiple projects as a member of Sandia’s High‑Performance Computing (HPC) Systems department (9327). The successful candidate will work with Senior Scientists/Engineers and a talented group of HPC subject‑matter experts on leading‑edge R&D, developing new technologies and approaches to solve complex problems with Laboratory and national impact.

• Collaborate with Senior Scientists/Engineers and HPC experts on leading‑edge R&D and production computing activities.
• Represent Sandia HPC in the NNSA Tri‑Lab arena, the Office of Science/DOE community, and at the national level.
• Serve as a resource to users and peers, line management, and Advanced Simulation and Computing (ASC) program management to achieve SNL’s vision for HPC.
• Build long‑term relationships across Tri‑Lab HPC centers supporting science and engineering applications and customers.
• Lead multi‑disciplinary, cross‑organizational teams, working with line management to fulfill specific job responsibilities and broader HPC objectives.
• Deliver and support state‑of‑the‑art HPC user programming environments and apply tools for performance characterization and problem solving.
• Engage in performance analysis and tuning, benchmark development, application porting and debugging, and application tool development and support.
• Participate in software development in direct support of Sandia engineering/scientific codes.
• Provide five relevant references who can specifically speak to work and contributions within Sandia and beyond.
• Work onsite as required.

• Master’s degree in CS/engineering with at least 10 years of experience (or a doctorate/equivalent) with cross‑division work across Sandia, the Nuclear Security Enterprise, other agencies, commercial partners, and international scientific communities.
• Proven R&D leadership (e.g., Principal Investigator for Tri‑Labs or similar sponsor‑driven projects); ability to organize technical teams; demonstrated subject‑matter expertise in applying computational capabilities to science and engineering challenges.
• Hands‑on experience with HPC architectures and environments, large‑scale scientific/engineering codes (ASC or similar), and performance optimization on NNSA ATS/CTS systems.
• Proficiency in FORTRAN, C, C++, Linux development, modern build tools (CMake, Git Lab), Dev Sec Ops , and CI/CD pipelines.
• Strong verbal, written, and presentation skills.
• DOE Q security clearance or DOD equivalent required to start.

• Experience with massively parallel programming, including MPI and/or multi‑threading.
• Experience working with ASC programs and interfacing with Federal Program Managers.
• Ability to work on technical problem solving and in‑depth consulting for applications in HPC environments.
• Familiarity with analyst workloads/workflows on large‑scale mission applications.
• Familiarity with data‑intensive computing workloads.
• Experience debugging large‑scale, parallel applications and conducting scalability studies.
• Experience with software engineering tools and practices, emerging programming models and languages, and cloud‑computing environments.
• Ability to learn and apply new software tools and provide customer service.
• Experience developing high‑fidelity, high‑performance software for…