Accelerator Physicist

What you'll do

You will engage in the design and specification of beam transfer systems across CERN’s accelerator complex, following the systems from initial concept to beam commissioning and operational deployment. An intrinsic part of your work will be to carry out the R&D needed to understand the performance of existing beam transfer systems and to propose improvements or upgrades needed to meet the future needs of CERN’s ambitious research programme.

Your responsibilities

Design and specify beam transfer systems (injection, extraction, primary beamlines/transfer lines) in collaboration with internal and external partners, including drafting technical and functional requirements.
Develop and perform beam dynamics simulations including advanced ML/AI-based models to analyse, predict, and optimise system behaviour and performance.
Conduct R&D to improve system performance and reliability, including planning and coordinating machine development studies to validate new concepts.
Commission beam transfer systems with particle beams, diagnose operational issues, and propose solutions to maintain or enhance performance.
Communicate results through peer-reviewed publications, conference contributions, and clear presentations tailored to both technical and non-technical audiences.
Supervise students and coordinate postdoctoral research contributions to beam transfer studies and R&D activities.

Still here? Let's make a quick check about

Your profile

Experience in accelerator physics, including beam dynamics and modelling with simulation tools.
Practical experience at accelerator facilities with machine development studies, beam commissioning and operational support.
Ability to analyse complex technical problems, evaluate system performance, and develop data-driven solutions.
Demonstrated expertise in developing robust software for simulation, data analysis, and/or automation with the application of Machine Learning, AI, and/or advanced optimisation techniques.
Master's degree or PhD or equivalent relevant experience in the field of Physics, Applied Physics or a related field.

Your skills

Knowledge and application of accelerator physics theory;
Knowledge and application of beam injection and extraction methods, beam transfer and dumping;
Simulation, design and development of primary and secondary beam lines;
Analysis and optimisation of accelerator performance, including application of machine learning and AI concepts;
Knowledge of/ identification and selection of relevant emerging accelerator technologies;
Takes responsibility for own actions and decisions;
Remains objective, focused and productive in a stressful environment; focuses on solutions rather than problems;
Is willing to work on different projects simultaneously;
Shares knowledge and expertise freely and willingly with others; coaches others to ensure knowledge transfer;
Delivers presentations in a structured and clear way; adjusts style and content to the audience; responds calmly and confidently to questions;
Spoken and written English, with a commitment to learn French.

Ideal start date: 01/08/2026

Contract duration: 60 month contract

Grade range: 6

Benchmark job: 200140 - Applied 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.
Work during nights, Sundays and official holidays, when required by the needs of the Organisation.

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 SY department oversees the technical systems related to accelerator beams, including instrumentation, beam transfer, power converters, 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!

Ready To apply?

Be prepared with our resources and tips

All good?

Apply now Allow 15 minutes to complete your online application

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.