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Testing for Numerical Software - Postdoctoral Researcher

Mid-Senior Level | Full-time
Information Technology/Computing | livermore, CA | 03/16/2023

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Company Description

Join us and make YOUR mark on the World!

Are you interested in joining some of the brightest talent in the world to strengthen the United States’ security? Come join Lawrence Livermore National Laboratory (LLNL) where our employees apply their expertise to create solutions for BIG ideas that make our world a better place.

We are committed to a diverse and equitable workforce with an inclusive culture that values and celebrates the diversity of our people, talents, ideas, experiences, and perspectives. This is important for continued success of the Laboratory’s mission.

Pay Range

$126,720 Annually for the PDS.1 level 

Please note that the pay range information is a general guideline only. Many factors are taken into consideration when setting starting pay including education, experience, the external labor market, and internal equity.

Job Description

We have an opening for a Postdoctoral Researcher to perform research in advanced testing techniques for numerical software. You will work collaboratively with LLNL researchers to research and develop new testing methodologies to detect and mitigate numerical errors, targeting state-of-the-art heterogeneous many-core high-performance computing (HPC) systems. This position is in the Center for Applied Scientific Computing (CASC) Division within the Computing Directorate.

You will 

  • Research, design and implement tools combining static and dynamic techniques and/or formal methods to detect and mitigate numerical errors in scientific applications.
  • Research, design and develop mechanisms to diagnose the origin of numerical errors in heterogenous systems, e.g., systems composed of CPU and GPU devices.
  • Research, design and develop practical methods to understand how system configurations, inputs, code generation, and other factors impact the correctness of numerical software.
  • Document research by publishing papers in peer-reviewed media and presenting papers within the DOE community and at academic conferences.
  • Contribute to group grant proposals, including proposal presentations and preparation of proposals that will provide future research opportunities in the field, and participate in the establishment of future research directions.
  • Pursue independent (but complementary) research interests and interact with a broad spectrum of scientists internally and externally to define and carry out the research.
  • Perform other duties as assigned.


  • Recent Ph.D. in Computer Science, or a related field.
  • Experience in parallel computing, scientific computing, or a related field.
  • Ability to perform research and development in static analysis techniques, dynamic analysis techniques, or formal method tools to test numerical software.
  • Ability to conduct high-quality research and develop implementations to evaluate research ideas independently.
  • Experience in programming C/C++ in a Unix/Linux environment.
  • Proficient verbal and written communication skills necessary to interact in a clear and concise manner, author technical and scientific reports and papers, and deliver scientific presentations.
  • Ability to take the initiative and have interpersonal communication skills necessary to work effectively in a dynamic team environment.

Qualifications We Desire

  • ​​​​​​Experience developing program analysis techniques in the Clang/LLVM compiler.
  • Knowledge of floating-point arithmetic and different floating-point precision formats, such as FP16, BFLOAT16, or others.
  • Experience in parallel programming, preferably in widely used parallel programing models, such as OpenMP, CUDA, HIP and/or MPI.

Additional Information

All your information will be kept confidential according to EEO guidelines.

Position Information

This is a Postdoctoral appointment with the possibility of extension to a maximum of three years, open to those who have been awarded a PhD at time of hire date.

Why Lawrence Livermore National Laboratory?

Security Clearance

None required.  However, if your assignment is longer than 179 days cumulatively within a calendar year, you must go through the Personal Identity Verification process.  This process includes completing an online background investigation form and receiving approval of the background check.  (This process does not apply to foreign nationals.) 

Pre-Employment Drug Test

External applicant(s) selected for this position must pass a post-offer, pre-employment drug test. This includes testing for use of marijuana as Federal Law applies to us as a Federal Contractor.

Equal Employment Opportunity

We are an equal opportunity employer that is committed to providing all with a work environment free of discrimination and harassment. All qualified applicants will receive consideration for employment without regard to race, color, religion, marital status, national origin, ancestry, sex, sexual orientation, gender identity, disability, medical condition, pregnancy, protected veteran status, age, citizenship, or any other characteristic protected by applicable laws.

We invite you to review the Equal Employment Opportunity posters which include EEO is the Law and Pay Transparency Nondiscrimination Provision.

Reasonable Accommodation

Our goal is to create an accessible and inclusive experience for all candidates applying and interviewing at the Laboratory.  If you need a reasonable accommodation during the application or the recruiting process, please use our online form to submit a request. 

California Privacy Notice

The California Consumer Privacy Act (CCPA) grants privacy rights to all California residents. The law also entitles job applicants, employees, and non-employee workers to be notified of what personal information LLNL collects and for what purpose. The Employee Privacy Notice can be accessed here.

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