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Computational Accelerator Physics - Postdoctoral Researcher

Entry Level | Full-time
Engineering | livermore, CA | 03/14/2023

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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 essential to innovation and creativity for continued success of the Laboratory’s mission.

Pay Range

$108,600 - $126,720 Annually

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 work on Computational Accelerator Physics in support of designing and building the next generation many-pulse radiography Linear Induction Accelerator (LIA). The assignment includes development of tools to enable Exascale computation of next generation LIA designs in WarpX a new Particle-In-Cell code suite built on top of AMReX. (The work will be predominantly computational, however benchmarking of newly developed simulation codes, physics packages, and LIA models to existing radiography accelerators (i.e.Flash X-Ray Facility (FXR)) will be required, and may include shot proposals and data analysis. In this role you will also publish research results in peer-reviewed journals, and present results at external conferences, seminars, and/or technical meetings. This position is in the Electromagnetics Section in the National Security Engineering (NSED), within the Engineering Directorate. 

In this role you will 

  • Conduct research and development of advanced Linear Induction Accelerator simulation efforts.
  • Add physics packages into scientific code to capture relevant beam/surface interactions.
  • Deploy and test simulation code on Exascale HPC environments.
  • Pursue independent (but complementary) research interests and interact with a broad spectrum of scientists internally and externally to the Laboratory.
  • Collaborate with others in a multidisciplinary team environment to accomplish research goals.
  • Publish research results in peer-reviewed scientific or technical journals and present results at external conferences, seminars, and/or technical meetings.
  • Ability to travel as necessary to participate in experiments at accelerator facilities.
  • Perform other duties as assigned.


  • Ability to secure and maintain a U.S. DOE Q-level security clearance which requires U.S. citizenship.
  • PhD in Physics, Engineering, or related computational science field.
  • Ability to perform independent research and use a scientific approach to solve problems.
  • Ability to develop and maintain scientific code within a team environment. 
  • Experience with large scale, parallel (e.g. MPI/OpenMP/CUDA/etc.) numerical simulation techniques (e.g. Particle-In-Cell) for solving complex, coupled partial differential equations. 
  • Proficient verbal and written communication skills, such as would be needed to write reports, peer-reviewed publications, and proposals.
  • Effective initiative and interpersonal skills and ability to work in a collaborative, multidisciplinary team environment. 

Qualifications We Desire

  • Experience with one or more of the following areas: Relativistic plasma or electron beam simulation techniques,  high current density and space charge limited accelerator beam physics and simulation techniques, high energy electron beam/surface interaction physics, plasma physics, accelerator physics, electrical engineering. 
  • Familiarity with standard coding practices. (e.g. Git, CI, Unit testing, etc.).

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

This position requires a Department of Energy (DOE) Q-level clearance.  If you are selected, we will initiate a Federal background investigation to determine if you meet eligibility requirements for access to classified information or matter. Also, all L or Q cleared employees are subject to random drug testing.  Q-level clearance requires U.S. citizenship. 

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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