Superconducting RF Engineer

What you'll do

Join CERN’s mission to advance accelerator technology. As an Engineer in the Superconducting Radio-Frequency Section, you will design and develop key RF components for the new 400 MHz Demonstrator Cryomodule, contributing to innovations that will drive the future of particle physics.

You will join the Accelerator Systems Department (SY), which is responsible for the beam-related technical systems of the CERN accelerators. The SY teams design, build and operate equipment systems in all CERN accelerators, and are engaged in ambitious forward-looking R&D programmes.

You will join the SC RF Cavity Technology Section, of the Radiofrequency Group. You will participate in the development of RF power components, and in particular the fundamental RF power couplers and HOM RF power extraction couplers, which are highly sophisticated and critical components in the RF power transmission to accelerator SRF cavities.

Your responsibilities

Take a significant part in the mechanical design of FPCs and HOM couplers, including material selection and manufacturing technologies.
Perform coupled RF, thermal, and mechanical simulations across all operating conditions, from room temperature to cryogenic (<4.5 K), optimising designs for efficiency and reliability.
Contribute to the design, construction, and operation of test stations for RF conditioning and high-power qualification.
Oversee the production and assembly of prototypes, including preparation of specifications, cleanroom procedures, quality control, and documentation.
Support cryogenic qualification testing on single cavities and full assemblies.
Collaborate across internal and external teams, reporting progress and presenting results in workshops and conferences.

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Your profile

Demonstrated experience in mechanical and electrical engineering aspects of RF equipment applied to scientific instruments.
Demonstrated experience with electromagnetic simulation tools for evaluating RF fields, power dissipation, and multipacting effects, in addition to mechanical and thermal finite element computations and computer-aided design software.
Demonstrated experience in coordinating multidisciplinary projects for scientific instruments, covering the full lifecycle from conceptual and electromagnetic design through mechanical integration, prototyping, RF testing, and qualification.
Experience in preparing technical specification, technical reports and publishing paper in international conferences.
Master's degree or PhD or equivalent relevant experience in the field of Electrical or Mechanical Engineering or a related field.

Your skills

Knowledge and application of RF techniques, incl. electrical engineering techniques for the design, testing, and optimization of superconducting RF systems.
Design and analysis of mechanical structures.
Knowledge and application of cryogenic heat transfer and insulation techniques.
Design and modelling of RF accelerating structures.
Knowledge and application of clean-room techniques.
Takes responsibility for own actions and decisions, and takes initiative beyond regular tasks to make things happen.
Thinks “out of the box” and proposes fresh ideas, insights and methodologies, while adapting quickly and resourcefully to shifting priorities and requirements.
Understands when teamwork is required to achieve the best results; includes others accordingly and shares information.
Spoken and written English or French, with a commitment to learn the other language.

Ideal start date: 01/05/2026

Contract duration: 60 month contract

Grade range: 6

Benchmark job: 200030 - Electrical Engineer

Job flexibility: Fully Onsite

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.
Participation in a regular stand-by duty, including nights, Sundays and official holidays.
Work in Radiation Areas.
Interventions in underground installations.

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!

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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.