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Geant4 Jobs (NOW HIRING)

Radiation Engineer II

Denver, CO · On-site

$95K - $130K/yr

Familiarity with radiation transport and shielding analysis tools (NOVICE, FASTRAD, GEANT4) * Familiarity with circuit simulation tools such as LTSpice or PSpice * Familiarity with space charging ...

Radiation Engineer II Jobs

Denver, CO · On-site

$95K - $130K/yr

Familiarity with radiation transport and shielding analysis tools (NOVICE, FASTRAD, GEANT4) * Familiarity with circuit simulation tools such as LTSpice or PSpice * Familiarity with space charging ...

Radiation Engineer II

Denver, CO · On-site

$95K - $130K/yr

Familiarity with radiation transport and shielding analysis tools (NOVICE, FASTRAD, GEANT4) * Familiarity with circuit simulation tools such as LTSpice or PSpice * Familiarity with space charging ...

Radiation Engineer II

Long Beach, CA · On-site

$95K - $130K/yr

Familiarity with radiation transport and shielding analysis tools (NOVICE, FASTRAD, GEANT4) * Familiarity with circuit simulation tools such as LTSpice or PSpice * Familiarity with space charging ...

Data Scientist

San Leandro, CA · On-site

$145K - $190K/yr

MCNP, GEANT4, FLUKA, PIC codes such as LSP, EPOCH, or WarpX; MHD codes such as USim, FLASH, or HYDRA-class; or DPF-specific codes such as Lee model or GORGON-adjacent work. * Prior work fitting ...

Showing results 21-38

Geant4 information

What is Geant4?

Geant4 is a software toolkit for the simulation of the passage of particles through matter, widely used in high energy physics, nuclear experiments, and medical physics. It allows scientists and engineers to model how particles interact with complex geometries and materials, helping to design detectors and optimize experiments. Written in C++, Geant4 provides a flexible and extensible framework for simulating physics processes such as electromagnetic, hadronic, and optical interactions. The toolkit is developed by an international collaboration and is open-source, making it accessible to researchers around the world.

What are the key skills and qualifications needed to thrive as a Geant4 simulation developer?

To thrive as a Geant4 Simulation Developer, you need strong proficiency in C++ programming, a solid background in physics or engineering, and experience with Monte Carlo particle transport simulations. Familiarity with the Geant4 toolkit, scientific computing libraries, and version control systems like Git is typically required, and advanced degrees or certifications in physics or related fields are highly beneficial. Analytical thinking, problem-solving skills, and effective collaboration are essential soft skills for excelling in this role. These competencies are crucial for developing accurate simulations, troubleshooting complex issues, and supporting research or engineering projects in scientific and medical domains.

What are some common challenges faced by Geant4 developers when integrating simulations into larger research projects?

One common challenge Geant4 developers encounter is ensuring seamless integration of complex simulations into multidisciplinary research environments, which often involve collaboration with scientists, engineers, and software teams. This typically requires adapting simulation outputs to match the data formats and analysis workflows of the broader project, as well as maintaining code compatibility with evolving software dependencies. Effective communication and a solid understanding of project requirements are crucial to address these challenges and to contribute meaningful results to the team’s goals.

What is the difference between Geant4 vs Medical Physicist?

AspectGeant4Medical Physicist
Required CredentialsPhysics or engineering degree, programming skillsPhysics or medical physics degree, certification (e.g., ABR)
Work EnvironmentResearch labs, simulation developmentHospitals, clinics, radiation therapy centers
Industry UsageParticle physics, radiation simulationMedical imaging, radiation therapy, diagnostics

While Geant4 focuses on developing and implementing physics simulations for research, Medical Physicists apply physics principles to diagnose and treat patients using radiation. Both roles require strong physics backgrounds, but their work environments and applications differ significantly.

More about Geant4 jobs

What cities are hiring for Geant4 jobs?

Cities with the most Geant4 job openings:

What states have the most Geant4 jobs?

States with the most job openings for Geant4 jobs include:

Infographic showing various Geant4 job openings in the United States as of August 2026, with employment types broken down into 95% Full Time, and 5% Contract. Highlights an 95% In-person, and 5% Remote job distribution.

$7.9K/mo

Full-time

Posted 26 days ago


Job description

The Accelerator Technology & Applied Physics (ATAP) Division at Lawrence Berkeley National Laboratory (LBNL) has multiple openings for Postdoctoral Scholars to join the Fusion Science & Ion Beam Technology Program as part of our work on developing nuclear techniques for mining applications and the detection of critical minerals and rare earth elements. 

You will contribute to the development of Associated Particle Imaging and data fusion with X-ray technology and pulsed neutron techniques to provide new methods to analyze both borehole measurements and mining ore products. 

Working closely with scientists and engineers within our Program, the Postdoc(s) will assist in the design, implementation, and utilization of novel instrumentation and combination of instruments to enhance the characterization of materials for processes involved in critical minerals and rare earth mining through hands-on experiments and AI-driven analysis.

The position involves collaborations with researchers at the University of California, Berkeley, and industry partners.

We're here for the same mission, to bring science solutions to the world. Join our team and YOU will play a supporting role in our goal to address global challenges! Have a high level of impact and work for an organization associated with 17 Nobel Prizes!

You will:

  • Assist and participate in the design, operation, and analysis of new instrumentation and technologies for active neutron interrogation to be used in boreholes (associated particle imaging)
  • Assist and participate in the design, operation, and analysis of combining instrumentation such as X-ray transmission measurements, pulsed neutron sources and associated particle imaging for measuring unknown materials on a conveyor belt.
  • Assist in the development of new data fusion methods (traditional and/or AI-based) to combine different measurement techniques
  • Assist in the development of a new FPGA-based data acquisition firmware
  • Collaborate on experiments, working closely with LBNL scientists, engineers, other postdocs and students. Communicate results through internal reports, internal and external presentations.
  • Document and communicate results of work in peer-reviewed journal publications and oral presentations.
  • Proactively promote and participate in matters relating to safety and environmentally sensitive work practices.
  • Adhere to Environment, Health and Safety (EH&S) policies and attend training classes as required.
  • Along with senior project team members, may mentor undergraduate and graduate students and visitors.

We are looking for:

  • Recent Ph.D. degree in physics, nuclear engineering, or related field.
  • Experience with two or more of the following areas:
    • Conducting experiments with neutron generators and X-ray sources.
    • Neutron, gamma, and X-ray detectors
    • FPGA-based data acquisition systems
    • Data fusion with traditional and/or AI methods
    • Coding (data analysis and instrumentation & control)
    • MCNP or GEANT4 neutron transport simulations
  • Ability to work independently.
  • Relevant publication record and demonstration of proficient written and oral presentation of scientific results.
  • Ability to work effectively in a team that includes engineers, scientific staff, technicians, and students.
  • Demonstrate good verbal and written communication skills.

Desired skills/knowledge:

  • Along with senior project team members, may mentor undergraduate and graduate students and visitors.

Additional information:

  • Application date: Applications will be accepted until the job posting is removed.
  • Appointment type: This is a full-time 2-year, postdoctoral appointment with the possibility of renewal based upon satisfactory job performance, continuing availability of funds and ongoing operational needs. You must have less than 3 years of paid postdoctoral experience. Salary for Postdoctoral positions depends on years of experience post-degree.
  • Salary range: This position is represented by a union for collective bargaining purposes. The salary range for this position is $5,756 - $9,136/month and is expected to start at $7,987/month or above based on a step schedule. Postdoctoral positions are paid on a step schedule per union contract and salaries will be predetermined based on postdoctoral step rates. Each step represents one full year of completed post-Ph.D. postdoctoral experience.
  • Background check: This position is subject to a background check. Any convictions will be evaluated to determine if they directly relate to the responsibilities and requirements of the position. Having a conviction history will not automatically disqualify an applicant from being considered for employment.
  • Work modality: Work will be primarily performed at: Lawrence Berkeley National Lab, 1 Cyclotron Road, Berkeley, CA. A REAL ID or other acceptable form of identification is required to access Berkeley Lab sites (for more information click here).

Want to learn more about working at Berkeley Lab? Please visit: careers.lbl.gov

Equal Employment Opportunity Employer: The foundation of Berkeley Lab is our Stewardship Values: Team Science, Service, Trust, Innovation, and Respect; and we strive to build community with these shared values and commitments. Berkeley Lab is an Equal Opportunity Employer. We heartily welcome applications from all who could contribute to the Lab's mission of leading scientific discovery, excellence, and professionalism. In support of our rich global community, all qualified applicants will be considered for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, age, protected veteran status, or other protected categories under State and Federal law.

Misconduct Disclosure Requirement: As a condition of employment, the final candidate who accepts an offer of employment will be required to disclose if they have been subject to any final administrative or judicial decisions within the last seven years determining that they committed any misconduct; or have filed an appeal of a finding of substantiated misconduct with a previous employer. For additional information, click here.