Job Description

You will become part of an international team working on the Upgrade of the ECAL sub-detector of the LHCb experiment.

Your responsibilities

• Mechanical assembly of modules made of lead or tungsten absorber and polystyrene fibres;
• Participation in the dismantling and reassembly of the LHCb ECAL in the coming years;
• Design and machining of precision pieces and tooling;
• Mechanical support for test beam campaigns.

More information here.

Your profile

• Experience with traditional and CNC machining;
• Knowledge of CAD software, ideally CATIA;
• Assembly of complex mechanical structures.

Skills:

• Gluing technologies;
• 3D printing;
• Quality Control testing;
• 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 Mechanics (or a related field) and your highest educational qualification is a general secondary education diploma.
• You have never had a CERN fellow or graduate contract before.
• Applicants with a Bachelor's, Master's or PhD degree are not eligible.

Additional Information

Job closing date: 11.01.2026 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-April-2026

This position involves:

• Work in Radiation Areas.
• Interventions in underground installations.
• A valid driving licence.
• Work during nights, Sundays and official holidays, when required by the needs of the Organisation.
• Exposure to lead.
• Exposure to ionising radiation and classified as category A.
• Exposure to risk of falling from heights during scaffolding assembly and dismantling operations.
• 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-LBD-2025-274-GRAE

Field of work: Mechanical Engineering

Benchmark job: 300090 - Mechanical Technician

What we offer

• A monthly stipend of 4624 Swiss Francs (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 http://home.cern.

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.