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Sterile Neutrino Search with Superconducting Detectors – Postdoctoral Researcher

Entry Level | Full-time
Postdoctoral/Fellowship | livermore, CA | 11/16/2021

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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.

Job Description

We have an opening for a Postdoctoral Researcher to take a leadership role in the sterile neutrino search based on beryllium-7 electron capture in superconducting tunnel junctions (BeEST experiment, LLNL is the lead institution for the experiment, and the successful candidate will install, test and operate superconducting tunnel junction (STJ) quantum sensor arrays in a liquid-cryogen-free dilution refrigerator. You will be expected to lead the LLNL experimental effort and make independent contributions to the search for physics beyond the standard model with the BeEST. You will also be able to spend 25% of your time to pursue your own research for career development. This position is in the Rare Event Detection group of the Nuclear and Chemical Sciences Division.

In this role you will 

  • Work with LLNL personnel and an international team of collaborators to install, test and operate superconducting tunnel junction quantum sensor arrays in a liquid-cryogen-free dilution refrigerator.
  • Participate in the development of radiation detectors based on arrays of superconducting tunnel junctions (STJs).
  • Lead the local experimental effort and make independent contributions to the search for physics beyond the standard model with the BeEST.
  • Be responsible for supervising graduate students and technicians.
  • Document and publish research results in peer-reviewed scientific or technical journals and present results at external conferences seminars and/or technical meetings.
  • Perform independent (but complementary) research and interact with a broad spectrum of scientists internally and externally to provide solutions for experimental physics questions.
  • Perform other duties as assigned.


  • PhD in low temperature physics, nuclear physics or related field.
  • Demonstrated knowledge of radiation detector development, in particular for superconducting detectors with operating temperatures below 100 mK.
  • Demonstrated knowledge of advanced data acquisition and analysis systems.
  • Ability to work independently on technical tasks, exert influence on technical objectives, provide in-depth analyses, and develop unique technical solutions.
  • Interpersonal skills necessary to interact with a diverse set of scientists, engineers, students, and other technical and administrative staff.
  • Effective written and verbal communication skills necessary to deliver presentations and prepare written reports.

Qualifications We Desire

  • Experience in neutrino and beyond-standard-model physics.
  • Experience with adiabatic demagnetization and dilution refrigerators.

Additional Information

Why Lawrence Livermore National Laboratory?

  • Included in 2021 Best Places to Work by Glassdoor
  • Work for a premier innovative national Laboratory
  • Comprehensive Benefits Package
  • Flexible schedules (*depending on project needs)
  • Collaborative, creative, inclusive, and fun team environment

Learn more about our company, selection process, position types and security clearances by visiting our Career site

COVID-19 Vaccination Mandate

LLNL demonstrates its commitment to public safety by requiring that all new Laboratory employees be immunized against COVID-19 unless granted an accommodation under applicable state or federal law. This requirement will apply to all new hires including those who will be working on site, as well as those who will be teleworking.

Security Clearance

LLNL is a Department of Energy (DOE) and National Nuclear Security Administration (NNSA) Laboratory.  Some positions will require a DOE L or Q clearance (please reference Security Clearance requirement above).  If you are selected and a clearance is required, we will initiate a Federal background investigation to determine if you meet eligibility requirements for access to classified information or matter. In addition, all L or Q cleared employees are subject to random drug testing.  An L or Q clearance requires U.S. citizenship.  For additional information please see DOE Order 472.2.

Pre-Employment Drug Test

External applicant(s) selected for this position will be required to 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.

Pre-Placement Medical Exam

A job related pre-placement medical examination may be required.

Equal Employment Opportunity

LLNL is an affirmative action and equal opportunity employer that values and hires a diverse workforce. 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.

LLNS is committed to offering reasonable accommodations during the application and recruiting processes due to a disability.  If you need assistance or an accommodation due to a disability, please submit a request via our online form

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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