Atomic Spectroscopy – Postdoctoral Researcher

Company Description
Join us and make YOUR mark on the World!
Lawrence Livermore National Laboratory (LLNL) has turned bold ideas into world-changing impact advancing science and technology to strengthen U.S. security and promote global stability. 
Our mission spans four critical national security areas nuclear deterrence, threat preparedness, energy security, and multi-domain defense empowering teams to take on the toughest challenges of today and tomorrow. With a culture built on innovation and operational excellence, LLNL is a place where your expertise can make a real impact.

Job Description
We have an opening for an Atomic Spectroscopy Postdoctoral Researcher to develop and apply solutions in laser-atom interactions, including the design of novel experimental equipment for that purpose. You will apply your expertise in atomic and molecular physics to plan, model and conduct novel experiments in the excitation and ionization of specific elements and isotopes. Additionally, you will support LLNL efforts in nuclear nonproliferation through development of detection equipment. This position is in the Laser Material Interaction Science group in the Materials for Emerging Applications and Extreme Conditions section of the Materials Science Division, within the Physical and Life Sciences Directorate.
This position requires full-time on-site presence due to the nature of the work.
You will 
• Work on a highly interdisciplinary, multi organizational team to develop concepts for selectively ionizing atoms using your expertise in experimental laser spectroscopy.
• Perform quantitative modeling and simulations of atomic systems to predict their response to various laser excitation schemes.
• Develop, maintain, and execute LLNL atomic photoionization codes to support LLNL interactions with external partners, including code development and benchmarking with experiments.
• Design and operate experimental equipment for the development and demonstration of new selective photoionization or analytical spectroscopic instruments.
• Assist in developing proposals to address current topics in atomic and molecular spectroscopy and isotope production technology, shaping future research directions and capabilities.
• Publish research results in high-impact, peer-reviewed scientific or technical journals.
• Present findings at external conferences, seminars, and/or technical meetings within the isotope production community.
• Collaborate with others in a multidisciplinary team environment to accomplish research goals.
• Perform other duties as assigned.

Qualifications
• Ability to secure and maintain a U.S. DOE Q-level security clearance, which requires U.S. Citizenship.
• Ph.D. in physical chemistry, mechanical, nuclear engineering, engineering physics, or a closely related field with graduate-level coursework in laser spectroscopy.
• Experience in two or more of the following: atomic and molecular physics, laser spectroscopy, laser development, physical chemistry, development and analysis of computational algorithms.
• Advanced analytical skills necessary to solve complex technical problems.
• Proficient in programming language such as MATLAB or Python, including experience in implementing physics and engineering codes for solving complex laser-atom interactions via the density matrix approach.
• Ability to work both independently and collaboratively in multidisciplinary teams, including teams consisting of theorists and experimentalists.
• Experience authoring technical and scientific reports and publications, and in delivering scientific presentations.
• Proficient verbal and written communication skills necessary to effectively collaborate in a team environment, present and explain technical information, and provide clear advice to management and sponsors.

Qualifications We Desire
• Experience designing novel laser spectroscopy methods and equipment focused on selective excitation or ionization of target atoms.
• Experience in modeling the laser excitation and relaxation of atomic and molecular vapors.
• Experience in assembling and maintaining ultra-high vacuum (UHV) equipment.

Pay Range
$123,048 Annually 
This is the lowest to highest salary we in good faith believe we would pay for this role at the time of this posting.  An employee’s position within the salary range will be based on several factors including, but not limited to, specific competencies, relevant education, qualifications, certifications, experience, skills, seniority, geographic location, performance, and business or organizational needs.

Additional Information
#LI-Onsite

Position Information
This is a Postdoctoral appointment with the possibility of extension to a maximum of three years. The postdoctoral appointment is a temporary, mentored training position intended for individuals in the early stages of their postdoctoral research careers. Consistent with the structure of the program, applicants must have received their Ph.D. (or equivalent doctorate) within five years of the anticipated start date.

Why Lawrence Livermore National Laboratory?
• Included in 2026 Best Places to Work by Glassdoor!
• Flexible  Benefits Package
• 401(k)
• Relocation Assistance
• Education Reimbursement Program
• Flexible schedules (*depending on project needs)
• Our values - visit  https://www.llnl.gov/inclusion/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.

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