Calorimeter Development Physicist - European Organization for Nuclear Research (Geneva)

About this position

The summary below is published by European Organization for Nuclear Research on the official vacancy notice. Our own analysis — salary realism, comparable openings, career trajectory, language profile — follows further down the page.

Key responsibilities

According to the vacancy notice, the role centres on the following duties:

• Actively participate in ongoing R&D efforts to develop and optimise Spaghetti Calorimeter (SpaCal) technology for the LHCb PicoCal and other applications
• Take part in the test-beam and laboratory characterisation of SpaCal prototype modules, with the aim of optimising the time resolution
• Contribute to studies aimed at optimising photon detectors for SpaCal technology
• Characterise novel radiation-hard, fast crystal scintillating fibres and organic scintillating materials
• Document the results in scientific publications

Are you eligible?

Check these requirements from the notice before investing time in an application:

• Education: Master's degree with 2 to 6 years of post-graduation professional experience, or PhD with no more than 3 years of post-graduation professional experience
• Experience: Proven track record in the development of detectors for particle physics experiments. Demonstrated experience in calorimeter detector testing, both in the laboratory and in test-beam environments.
• Languages: English (spoken…), French (commitm…)
• Key skills: Understanding of optical calorimeter concepts, Practical knowledge of laboratory equipment and data acquisition systems, Ability to work effectively in an international, multidisciplinary team with physicists, engineers and technicians, Knowledge of programming languages such as C++ and Python
• Eligibility: You are a national of a CERN Member or Associate Member State. You have a professional background in Physics (or a related field). You have never had a CERN fellow or graduate contract before. Medical clearance required before contract offer is confirmed.

Contract and working arrangements

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

Working arrangements: Hybrid.

Hiring unit: Experimental Physics (EP) Department.

Position details

Reference

EP-LCB-2026-126-GRAP

Last Verified

22 July 2026

Position overview

This is the official EU Careers listing for Calorimeter Development Physicist at CERN based in Geneva (Other). The vacancy reference is EP-LCB-2026-126-GRAP. The role falls under the Research domain.

As an applied physicist, you will contribute to the development of radiation-hard Spaghetti Calorimeter (SpaCal) technology with dense absorbers to achieve picosecond-level time resolutions. This work is part of the strategic detector R&D programme within the Experimental Physics (EP) Department at CERN.

Your responsibilities

* Actively participate in ongoing R&D efforts to develop and optimise Spaghetti Calorimeter (SpaCal) technology for the LHCb PicoCal and other applications. * Take part in the test-beam and laboratory characterisation of SpaCal prototype modules, with the aim of optimising the time resolution. * Contribute to studies aimed at optimising photon detectors for SpaCal technology. * Characterise novel radiation-hard, fast crystal scintillating fibres and organic scintillating materials. * Document the results in scientific publications.

More information [here](https://ep-dep.web.cern.ch/ep-research-development).

Your profile

* Proven track record in the development of detectors for particle physics experiments. * Demonstrated experience in calorimeter detector testing, both in the laboratory and in test-beam environments. * Experience in the characterisation of photon detectors and/or scintillators is an advantage. * Experience in the simulation of optical calorimeter technologies is an advantage.

Skills

* Understanding of optical calorimeter concepts. * Practical knowledge of laboratory equipment and data acquisition systems. * Ability to work effectively in an international, multidisciplinary team with physicists, engineers and technicians. * Knowledge of programming languages such as C++ and Python. * Spoken and written English, with a commitment to learn French.

Eligibility criteria:

* You are a national of a [CERN Member or Associate Member State](https://home.cern/about/member-states). * You have a professional background in Physics (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: 22.07.2026 at 23:59 CEST.

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

Working hours: 40 hours per week

Job flexibility: Hybrid

Target start date: 01-November-2026

This position involves:

* Work in Radiation Areas. * Interventions in underground installations. * Work during nights, Sundays and official holidays, when required by the needs of the Organization. * Exposure to lead. * 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._

Job reference: EP-LCB-2026-126-GRAP

Field of work: Applied Physics

Benchmark job: 200140 - Applied Physicist

Global Benefits

* 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.

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!

More information about us, here:[careers.cern](https://careers.cern/)

Application timeline

This vacancy was first listed on 1 July 2026, 25 days ago.

No closing date is published in the source feed for this position. EU vacancies typically remain open for four to eight weeks; check the official vacancy notice for the cut-off date and time.

Last verified against the EU Careers feed on 22 July 2026 (4 days ago).

Where to learn more

For headcount, mission, and other open vacancies at CERN see the CERN institution page; for the cost of living, correction coefficient, and other postings in Geneva see our Geneva location page; for related vacancies in the Research field browse our Research domain page.

New to EU careers? Our beginner's guide walks through entry routes, EPSO competitions, and what to prepare. For application logistics see application tips and EPSO competitions.