Applied physicist

Computational Physicist - Beam Simulation Software (BE-ABP-CAP GRAP)

• Full-time

The Computational Accelerator Physics section (BE-ABP-CAP) develops and maintains CERN's software ecosystem for accelerator design and beam-dynamics simulation, providing the tools and models that drive machine performance and future upgrades. In this role you will directly contribute to the development an evolution of these tools. You will collaborate with the maintainers of accelerator model repositories to ensure their consistency and interoperability, and create new computational methods to model physical phenomena relevant to future collider design, such as the FCC-ee. This position offers a unique opportunity to work at the interface of accelerator physics, scientific software development, and large-scale simulation, driving the design of next-generation accelerators at CERN.

Your responsibilities

• Participate in the development and evolution of the CERN software stack for accelerator design and beam dynamics simulation.
• Develop numerical methods and software solutions for modelling physical phenomena relevant for FCC-ee design.
• Build and maintain accelerator models of current and future machines comprising the CERN accelerator complex, to be used in simulation studies and design optimisation.
• Collaborate with users and maintainers of accelerator model repositories to ensure consistency, integration, and efficient sharing of resources.

Your profile

Experience :

• Experience in Accelerator Physics and software development in a scientific computing context.
• Experience in developing computation physics simulation software following good practices is an asset.
• Motivation to work at the intersection of novel accelerator design s and simulation tools.
• Ability to collaborate in a multidisciplinary and international team environment.

Skills:

• Knowledge of accelerator modelling and beam dynamics simulation tools (e.g. Xsuite, MAD, SAD, ...).
• Programming skills (Python, C) for code development and data analysis.
• Familiarity with numerical methods and scientific computing tools.
• Problem-solving mindset and ability to learn new tools and concepts quickly.
• Spoken and written English, with a commitment to learn French.

Eligibility criteria:

• You are a national of a CERN Member or Associate Member State .
• You have a professional background in Applied physicist (or a related field) and have either:
  • a Master's degree with 2 to 6 years of post-graduation professional experience;
  • or a PhD with no more than 3 years of post-graduation professional experience.
• You have never had a CERN fellow or graduate contract before.

Job closing date: at 23:59 CET.

Contract duration: 24 months, with a possible extension up to 36 months maximum.

Working hours: 40 hours per week

Job flexibility: Fully Onsite

Target start date: 01-March-2026

Job reference: BE-ABP-CAP GRAP

Field of work: Applied Physics

Benchmark job: Applied Physicist

What we offer

• A monthly stipend ranging between 6287 and 6911 Swiss Francs per month (net of tax) .
• Coverage by CERN's comprehensive health scheme (for yourself, your spouse and children), and membership of the CERN Pension Fund .
• Depending on your individual circumstances: installation grant; family, child and infant allowances; payment of travel expenses at the beginning and end of contract.
• 30 days of paid leave per year .
• On-the-job and formal training at CERN as well as in-house language courses for English and/or French.

About us

At CERN, the European Organization for Nuclear Research, physicists and engineers are probing the fundamental structure of the universe. Using the world's largest and most complex scientific instruments, they study the basic constituents of matter - fundamental particles that are made to collide together at close to the speed of light. The process gives physicists clues about how particles interact, and provides insights into the fundamental laws of nature. Find out more on

We are on a Quest. A Journey into discovery like no other. Bring your expertise to our unique work and develop your knowledge and skills at pace. Join world-class subject matter experts on unique projects, in a Quest for greater knowledge and deeper understanding.

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Diversity has been an integral part of CERN's mission since its foundation and is an established value of the Organization. Employing a diverse workforce is central to our success.

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