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

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CERN invites applications for a Mechanical Engineer (EP-FCC-2026-51-GRAE) to join a team developing a calorimeter for the FCC-ee program. You will lead CAD design of the detector geometry, coordinate with the MDI and cavern integration teams, and evaluate construction techniques to support a validated structure. The role requires solid CAD experience, creativity, and collaboration, plus fluent English and a commitment to learning French. Eligibility is strict: maximum two years post graduation experience and a Bachelor or Master degree, no PhD, and no prior CERN fellowship or contract. The 24 month hybrid contract starts 1 April 2026 in Geneva, with extension possible and a CHF stipend. Apply by 09 March 2026 23:59 CET, emphasizing CAD work, integration considerations, and problem solving under physics constraints.

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:

• 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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