CMS Radiation Simulation and Protection Physicist

What you'll do

Join CERN’s CMS team and provide support on radiation protection matters while taking charge of simulations to evaluate the operation scenarios of the detectors and define the needed shielding. You will also participate in long shutdown activities as key member of the field radiation protection team, and provide directions and support to the different teams involved in the process.

Your responsibilities

Support the CMS Technical Coordination (TC) Team in operational matters during shutdowns relating to radiation. protection and optimisation of personnel dose.
Contribute to feasibility studies and simulations for shielding options and upgrade planning, as relevant.
Perform simulations of prompt radiation throughout detectors and cavern.
Collaborate with HSE-Radio Protection on activation-scenario simulations, especially during shutdowns, to optimise ALARA planning.
Disseminate radiation-simulation results and materials across CMS.
Respond to simulation and analysis requests from CMS subsystems, prioritizing according to TC needs.
Maintain and update the CMS nominal FLUKA model.
Participate in radiation and activation measurements in the CMS cavern to both benchmark the FLUKA module.

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Your profile

Knowledge of radiation protection, operational dosimetry, and safety planning;
Demonstrated experience in Monte Carlo radiation-transport simulations using FLUKA;
Experience in radiation measurements and benchmarking;
Master's degree or equivalent relevant experience in the field of Physics, Engineering or a related field. RP qualification from a certified body would be a plus.

Your skills

Knowledge and application of ionising radiation;
Simulation of radiation environments;
Knowledge and application of instrumentation and measurement techniques;
Knowledge of Radiation Safety and personal dosimetry;
Builds and maintains constructive and effective work relationships;
Ensures that information, procedures and decisions are appropriately documented;
Delivers high quality work on time and fulfils expectations; works well autonomously; takes on activities and tasks without prompting;
Adapts quickly and resourcefully to shifting priorities and requirements;
Spoken and written English, with a commitment to learn French.

Ideal start date: 01/03/2026

Contract duration: 60 month contract

Grade range: 6

Benchmark job: 200110 - Radiation Protection Physicist

Job flexibility: Fully Onsite

Team supervision

Medical hazard

Exposure to electromagnetic fields under certain exposure conditions.

Given the occupational health risks associated with this position, the selected candidate must obtain medical clearance before a contract offer is confirmed.

Employment conditions

A valid driving licence.
Shift work and participation in a regular stand-by duty, including nights, Sundays and official holidays, when required by the needs of the Organisation.
Interventions in underground installations.
Work in Radiation Areas.

Global Benefits at CERN

A minimum entry-salary of 9113 Swiss Francs per month (tax free), increasing in line with your years of relevant experience.
30 days of paid leave per year plus 2 weeks annual closure.
Coverage by CERN’s comprehensive health insurance scheme (for yourself, your spouse and children), and membership of the CERN Pension Fund.
Family, child and infant monthly allowances depending on your individual circumstances.
A relocation package (installation grant, removal, travel expenses) depending on your individual circumstances.
Possibility to extend your contract up to 8 years + eligibility for indefinite contract tenure.

Let's get you ready

Be sure to meet the eligibility criteria

You are a national of a CERN Member State or Associate Member State.
You have relevant qualifications and professional experience.
If you have previously held a Staff contract at CERN, you will not be eligible for these positions.
Please pay attention to the additional criteria and requirements for this specific position and mentioned above.

You will need these documents to complete your application

Your CV (English or French)
Any document you consider relevant to your application

Your CERNDepartment

The EP department conducts research in experimental particle physics and serves as a key reference center for the European physics community, contributing to the education and training of young scientists.

Overview of CERN

Discover a world where the impossible is made possible!

At CERN, the European Organization for Nuclear Research, we are pushing the frontiers of science and technology. Our groundbreaking work brings together not only physicists but also a diverse range of professionals from engineering, technical, scientific, and administrative fields. Together, we foster an environment where innovation and collaboration thrive.

Every day, we face exciting new challenges and opportunities to contribute to cutting-edge research that shapes our understanding of the universe. We meet these challenges through the diverse perspectives within our teams, ensuring every contribution is valued and driving our shared sense of inclusion and purpose. Diversity is a core value of CERN since its foundation, and it remains central to our mission and continued success.

If you are ready to be part of a dynamic, inclusive community pushing the boundaries of knowledge, CERN is the place where your curiosity and skills can thrive. Be part of our mission to uncover what lies at the heart of the universe! TAKE PART!

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Still have a doubt ? Here are the most frequently asked questions

What should I expect during my first week at CERN?

Your onboarding at CERN includes a comprehensive induction programme, which starts with an official welcome session at the beginning of each month. In addition, you will receive important information both before and after your arrival to ensure a smooth transition into your new role. This process is designed to help you get acquainted with CERN’s environment, your team, and the tools and systems you’ll be using.
How big would the team be?

The size of the team you'll be working with at CERN depends on the specific role and department. Some teams are small and highly specialized, while others are larger and more interdisciplinary. During the interview process, you'll have the opportunity to learn more about the team structure for the position you are applying for.
What is the working language at CERN?

The working languages at CERN are English and French. However, it is not always mandatory to speak both languages to work at CERN. We offer language training to help you acquiring the other language.
What support does CERN provide for relocation?

CERN does not offer direct assistance with relocation. However, depending on your role and specific criteria, you may be eligible for certain benefits such as an installation allowance and coverage of travel expenses to join CERN. These benefits are designed to help ease the transition when relocating to the Geneva area. For more information, please consult the “Salary, Benefits and Support“ page.
Do I need a visa to work at CERN?

Whether you need a visa to work at CERN depends on your nationality and the duration of your stay. CERN assists with the necessary visa and work permit processes for its employees and visitors. The specific requirements will be communicated to you during the recruitment process.
What would my salary be?

Salaries at CERN are determined by a structured scale. Salaries are based on your role, qualifications, and experience, and are not subject to negotiation. Specific details will be provided as your application progresses. For more information, please refer to the dedicated page.