Applied Physicist – Plasma Simulations

What you'll do

You will contribute to the preparation of a world-leading plasma accelerator experiment within an international collaboration. The project focuses on advanced simulation and modelling for Run 2 of the AWAKE experiment, scheduled to restart proton-beam operations in 2029 after CERN’s Long Shutdown 3. You will develop, benchmark and apply state-of-the-art plasma wakefield simulation tools to model beam-plasma interactions, including AWAKE’s long proton drive bunches and high-quality electron acceleration. Tasks include optimisation studies, parameter scans, and start-to-end simulations, as well as exploratory studies of extended plasma stages supporting future particle physics applications.

Your responsibilities

Develop and advance wakefield simulations tailored to long, self-modulated proton drive bunches, addressing one of AWAKE's central modelling challenges.
Carry out simulation studies of witness electron-beam acceleration, including optimisation of the electron, proton, and plasma parameters for Run 2.
Evaluate electron beam quality after acceleration (energy, energy spread, emittance, charge) and investigate strategies for achieving controlled properties.
Develop and conduct full start-to-end simulations of the Run 2 scenarios, from self-modulation development through electron injection through acceleration and extraction.
Investigate electron beam acceleration in scalable plasma sources of several tens of meters, assessing beam characteristics for future particle physics applications.
Contribute to the coordination AWAKE simulation activities, including alignment of tools, sharing of best practices, and support to junior collaborators working on simulations.
Work in close collaboration with the experimental team to ensure that numerical studies accurately reflect operational conditions and provide input to design decisions and technical specifications.

Still here? Let's make a quick check about

Your profile

Background in computational physics, accelerator physics, plasma physics, or a closely related field.
Experience with numerical simulations or particle-on-cell/beam-dynamics codes.
Familiarity with plasma or accelerator modelling (e.g. PIC simulations, kinetic or fluid models, beam tracking codes) is an advantage.
Prior exposure to high-performance computing environments is beneficial.
Experience in working on large-scale or multi-institution scientific computing projects is beneficial.
Your studies focused on Physics (applied, experimental, accelerator or a related field).

Your skills

Strong programming and scripting skills (e.g. Python, C++, Bash, or equivalent scientific computing languages).
Understanding of numerical methods for plasma modelling, beam dynamics, or high-energy physics simulations.
Interest in contribution to algorithmic improvements, code development, and long-term modelling strategies for advanced accelerator concepts.
Ability to work independently on challenging technical topics while engaging effectively with a wider modelling community.
Strong cross-disciplinary communication skills for efficient interaction with simulation and experimental teams.
Spoken and written English or French, with a commitment to learn the other language.

Ideal start date: 01/07/2026

Contract duration (in months): 24

Job flexibility: Fully Onsite

Employment conditions

Work during nights, Sundays and official holidays, when required by the needs of the Organisation.

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. Currently, we cannot consider applications from Pakistani and Lithuanian nationals for positions with a 2026 start date, as the ceiling defined under Article II.5 of the Associate Membership Agreement has been reached.
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)
A copy of your most relevant diploma or a certificate of achievement from your school (if you don't yet have your paper diploma)
Any document you consider relevant to your application

Your CERNDepartment

The BE department is at the heart of CERN's accelerator complex.

Its mission is to lead the development, construction, and operation of advanced particle accelerators, and to provide cutting-edge technology solutions that enable new discoveries in fundamental physics. Committed to promoting a culture of excellence, creativity and collaboration, individuals from diverse backgrounds contribute to the advancement of science and technology, as well as engaging in scientific education, outreach, and broader knowledge and technology transfer initiatives.

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.