Postdoctoral Research Staff - National Criticality Safety Division

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 dedicated to fostering a culture that values individuals, talents, partnerships, ideas, experiences, and diverse perspectives, recognizing their importance to the continued success of the Laboratory’s mission.

Pay 

$131,172 Annually

Job Description

We have multiple openings for Postdoctoral Researchers with experience in one or more of the following areas: nuclear physics; nuclear engineering; radiation transport; multiphysics simulation. We are seeking creative and flexible individuals who meet the scientific requirements and whose skills are aligned with the research mission of the National Nuclear Criticality Safety Program.  These positions will require interaction with professional colleagues inside and outside of the Laboratory and are located in the Nuclear Criticality Safety Division within the Environment, Safety and Health Directorate.

This position offers a hybrid schedule, blending in-person and virtual presence. You will have the flexibility to work from home one or more days per week. 

You will

• Collaborate in the design, modeling, and analysis of laboratory critical and subcritical experiments.
• Collaborate in the development of radiation measurement instrumentation and measurement of radiation fields.
• Design and oversee fabrication of equipment as required.
• Develop experimental procedures as required and guide them through safety and management reviews.
• Assist in performing criticality safety evaluations of laboratory work.
• Publish research results in peer-reviewed scientific or technical journals and present results at external conferences, seminars, and/or technical meetings.
• Perform other duties as assigned.

Qualifications

• Ability to secure and maintain a U.S. DOE Q-level security clearance which requires U.S. citizenship. 
• PhD in Nuclear Engineering, Physics, or related field.
• Experience with radiation transport methods, such as MCNP, SCALE, GEANT, COG, Serpent, OpenMC etc.
• Proficient verbal and written communication skills necessary to author technical and scientific reports, proposals, publications and deliver scientific presentations.
• Ability to work independently as well as in multidisciplinary research teams.
• Ability to respond quickly to diverse and shifting demands.
• Ability to provide in-depth analyses and develop unique technical solutions.

Qualifications We Desire

• Experience in computational physics and working knowledge of one or more programming languages (Python, FORTRAN, C++, etc).
• Experience with multiphysics simulation methods.
• Active DOE “Q” clearance.

Additional Information

#LI-Hybrid

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?

• Included in 2025 Best Places to Work by Glassdoor!
• Flexible Benefits Package
• 401(k)
• Relocation Assistance
• Education Reimbursement Program
• Flexible schedules (*depending on project needs)
• Our core beliefs - visit https://www.llnl.gov/diversity/our-values 

 

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.

Wireless and Medical Devices

Per the Department of Energy (DOE), Lawrence Livermore National Laboratory must meet certain restrictions with the use and/or possession of mobile devices in Limited Areas. Depending on your job duties, you may be required to work in a Limited Area where you are not permitted to have a personal and/or laboratory mo