Mechanical Engineer for FCC (EP-FCC-2026-51-GRAE)

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CERN seeks a Mechanical Engineer for the FCC project EP-FCC-2026-51-GRAE in Geneva, full time and onsite. You will join physicists and engineers to design an electromagnetic calorimeter based on a novel technology, produce detailed CAD models, evaluate construction techniques, and develop a supporting structure while coordinating with the MDI group and simulations teams. Essential: CAD experience in mechanical design, creativity and problem solving, ability to work in a multidisciplinary team, and fluent English with a commitment to learn French. Eligibility requires nationality of a CERN Member or Associate Member State, a maximum of two years post graduation experience, and a Bachelor or Master degree (no PhD, no prior CERN fellowship). The role is 24 months, hybrid, starting 01 April 2026. To apply, tailor your CV to highlight CAD, mechanical design, and cross team collaboration, provide concrete project examples, and ensure you meet the eligibility criteria; apply by 09.03.2026 23:59 CET.

Job Description

You will join a team of physicists and engineers working on the development of novel detector concepts for the FCC-ee physics program. You will be the main developer of an electromagnetic calorimeter design based on an innovative technology developed by collaborating institutes.

Your responsibilities

• Interact with physicists at CERN and at collaborating institutes to understand the key figures of merit of a calorimeter design based on the proposed technology.
• Work with CERN engineers and with the FCC Machine-Detector Interface (MDI) group to understand integration constraints related to the experimental cavern and to the collider elements.
• Develop and optimise the detector geometry, producing sufficiently detailed CAD models, in collaboration with the physicist in charge of the detector performance simulations.
• Evaluate construction techniques for the calorimeter mechanical elements, ensuring that both physics performance and structural requirements are met.
• Develop a concept for the overall supporting structure of the calorimeter and its integration within the overall detector mechanics, and validate the concept through structural analysis.
• Oversee the realisation of a demonstrator to validate the design and the selected technical solutions.

Your profile

• Experience with CAD software for mechanical design.

Skills

• Creativity and problem solving skills.
• Ability to work effectively in a multidisciplinary team.
• Spoken and written English, with a commitment to learn French.

Eligibility criteria:

• You are a national of a CERN Member or Associate Member State.
• By the application deadline, you have a maximum of two years of professional experience since graduation in Mechanical Engineering (or a related field) and your highest educational qualification is either a Bachelor's or Master's degree.
• You have never had a CERN fellow or graduate contract before.
• Applicants without University degree are not eligible.
• Applicants with a PhD are not eligible.

Additional Information

Job closing date: 09.03.2026 at 23:59 CET.

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

Job flexibility: Hybrid

Target start date: 01-April-2026

Job reference: EP-FCC-2026-51-GRAE

Field of work: Mechanical Engineering

Benchmark job: 200090 - Mechanical Engineer

Global Benefits

• A monthly stipend between 5266-5793 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.

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