Radiation Physicist for FCC-ee

What you'll do

In this role, you will perform Monte Carlo radiation transport studies for the FCC-ee experimental insertions, quantifying the radiation exposure of machine components and equipment installed in the FCC-ee tunnel. You will contribute to the design and optimisation of shielding solutions for both the final focus quadrupoles and the tunnel infrastructure. In addition, you will perform radiation background studies for the experiments.

Your responsibilities

Carry out particle-matter interaction studies with the FLUKA Monte Carlo code and implement geometry models for FCC-ee machine studies, in particular the Machine-Detector Interface.
Assess the expected radiation levels due to beam losses and synchrotron radiation emission in the FCC-ee experimental insertions.
Perform background studies as input for the detector design; closely collaborate with beam physicists in charge of particle tracking studies.
Actively participate in the conceptual design of radiation shielding assemblies; closely collaborate with mechanical engineers, in order to develop shielding concepts into technical specifications.

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Your profile

Knowledge of particle-matter interactions.
Experience with Monte Carlo radiation transport simulations.
Proficiency in scientific computing.
Knowledge of accelerator physics is an advantage.
The ability to collaborate in a multidisciplinary and international team environment.
Your studies focused on Applied Physics.

Your skills

Knowledge of Monte Carlo radiation transport codes (FLUKA, Geant4, etc.).
Basic programming skills (e.g. Python, C++) for data analysis and code development.
Familiarity with numerical methods and scientific computing.
Problem-solving mindset and ability to learn new tools quickly (e.g. auxiliary tools for particle transport simulations).
Excellent team-working attitude, with colleagues from different fields of applied physics and engineering.
Good level of both spoken and written English, with a commitment to learn French.

Ideal start date: 01/05/2026

Contract duration: 24 month contract

Job flexibility: Fully Onsite

Global Benefits at CERN

A monthly stipend between 6372-7004 Swiss Francs per month (tax free) depending on your degree.
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 and travel expenses) depending on your individual circumstances.
Possibility to extend your contract up to 36 months.
On-the-job and formal training including language classes.

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.
By the application deadline, you have a master’s degree with 2 to 6 years of professional experience since graduation or a PhD with a maximum of 3 years of professional experience since graduation. You are not eligible with only a bachelor’s degree.
You have never had a CERN fellow or graduate contract before.
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
A copy of your most relevant diploma or a certificate of achievement from your school (if you don't yet have your paper diploma)

Your CERNDepartment

The SY department oversees the science and technology related to accelerator technical systems, including beam instrumentation, beam transfer, power converters, particles generation and their interaction with matter, and radio frequency systems. It is responsible for the operation, maintenance, and development of new hardware and software for CERN’s accelerator complex.

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.
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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.