Mechanical Technician for CMS (EP-CMS-ICGRAE)

We are recruiting two early-career graduates for Mechanical Technician positions within the CMS experiment. Both positions involve hands-on mechanical work and close collaboration with technicians engineers and physicists but each will have a different main area of responsibility.

One position will join the Electromagnetic Calorimeter (ECAL) team supporting the refurbishment of the barrel electromagnetic calorimeter and covering a large panel of activities and responsibilities from mechanical work and the handling and assembly of detector parts to logistic activities.

The second position will join the CMS Technical Coordination crew supporting mechanical activities for the CMS detector and its infrastructure including maintenance upgrades tooling and heavy-lifting operations.

Your responsibilities

Key Tasks ECAL position:

• Participate in the extraction and insertion of the ECAL supermodules including the preparation installation and removal of the required tooling.
• Carry out mechanical operations during the refurbishment of the supermodules including the replacement of cooling fittings.
• Support the installation of ECAL services and electronics and assist with related logistics.

Key tasks Technical Coordination position:

• Participate in mechanical work for the upgrade maintenance and repair of the CMS detector and its associated infrastructure.
• Manufacture mechanical parts and contribute to on-site assembly installation alignment and repair activities.
• Support the development of tooling and the preparation or modification of technical drawings using drafting software such as CATIA.
• Participate in heavy-lifting and movement operations using equipment such as strand jacks air pads and hydraulic jacks and support regular checks and maintenance of this equipment.

Your profile

• Initial hands-on experience in the construction and assembly of mechanical components and structures.
• Experience in mechanical equipment or detector assembly including cooling connections pressure testing or leak detection.
• Experience using machine tools and hand tools for mechanical manufacturing activities.
• Experience with mechanical systems and the handling of large heavy or fragile equipment.
• Experience with drafting software such as CATIA.

Skills

• Knowledge of manufacturing techniques for mechanical parts.
• Experience in the assembly and integration of mechanical structures equipment and systems.
• Knowledge of the operation and maintenance of cooling-water systems.
• Experience in the safe operation of mechanical handling systems and the application of safety procedures related to heavy machinery and mechanical operations.
• Problem-solving skills and attention to detail.
• Ability to work both independently and collaboratively within a multidisciplinary team.
• Clear communication skills and the ability to follow technical instructions accurately.
• Spoken and written English or French with a commitment to learn the other language.

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 related (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 Bachelors Masters or PhD degree are not eligible.

Additional Information :

Job closing date: 12.10.2026 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: Fully Onsite

Target start date: 01-December-2026

This position involves:

• Work in Radiation Areas.
• Interventions in underground installations.
• Residence in the immediate vicinity of the Organizations installations.
• A valid driving licence.
• Work during nights Sundays and official holidays when required by the needs of the Organization.
• For the ECAL position: Exposure to risk of falling from heights during scaffolding assembly and dismantling operations.
• For the ECAL position: Exposure to electromagnetic fields under certain conditions.

Job reference: EP-CMS-ICGRAE

Field of work: Mechanical Engineering

Benchmark job: 300090 - Mechanical Technician

Global Benefits

• A monthly stipend of 4687 Swiss Francs per month (tax free).
• 30 days of paid leave per year plus 2 weeks annual closure.
• Coverage by CERNs 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!

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Remote Work :

No

Employment Type :

Full-time