Mechanical Technician for CMS Detector Upgrades (EP-CMS-IC-2026-97-LD)
At CERN, the European Organization for Nuclear Research, we use the world's largest and most complex scientific instruments to study the basic constituents of matter. Our work provides insights into the fundamental laws of nature.
Introduction:
As a mechanical technician, you will participate in upgrade projects of the CMS detector, covering a broad range of responsibilities: workshop-based mechanical work, installation of detector systems, and the design and use of tooling for the removal and installation of CMS sub‑detectors, as well as radioprotection duties in experimental areas and associated laboratories.
You will also take on coordination and operational responsibilities within the CMS Technical Coordination team, working closely with sub‑detector groups and CMS technical support teams.
Functions
Take responsibility for safety and radioprotection activities related to sub‑detector removal and installation, working with CMS safety officers and sub‑detector teams, operating in radioprotection‑classified areas, and applying safety rules.
Manage a mechanical workshop, advising and assisting CMS sub‑detector teams, ensuring the availability and proper use of equipment and tools, and supplying consumables.
Provide technical support and hands‑on assistance to CMS sub‑detector project teams operating within the CMS laboratories at CERN, in the fields of mechanical manufacturing, assembly, structures, and welding.
Take part in the development, testing, on‑site installation, and on‑detector operation of custom tooling for sub‑detectors, working with sub‑detector technical teams.
Operate and maintain hydraulic, mechanical, and electromechanical systems.
Organise and supervise the storage of sub‑detector equipment in CMS‑reserved spaces at CERN, ensuring proper inventory and space management.
Assist the territorial safety officer of the building where the mechanical workshop is located, supervising work requested on infrastructure for general safety, and using a mobile crane and forklift when needed.
Serve as the technical contact for mechanical activities with sub‑detector teams and for space areas under your responsibility, reporting regularly to the Technical Coordination managers.
Qualifications
Higher technical diploma or equivalent relevant experience in the field of Mechanics or Manufacturing Methods or a related field.
Training/certificates considered a plus:
Welding certificate
Radioprotection formal training
Hydraulic certificate
Experience
Experience in radioprotection and the ability to work in classified areas.
Proven ability to manage a mechanical workshop, including the use of standard machines and tools.
Strong organisational skills for coordinating teamwork and on‑site technical activities.
Proficiency in reading 2D and 3D technical drawings and manufacturing mechanical parts accordingly; experience in producing 2D and 3D drawings is an asset.
Solid background in the design, construction, and assembly of mechanical components and customised tooling.
Experience in the installation of structures and the use of specialised tooling for handling large equipment.
Ability to work effectively within multidisciplinary teams.
Proficiency with the operation and maintenance of hydraulic, mechanical, and electromechanical systems is considered a plus.
Knowledge and application of manufacturing methods and work preparation.
Assembly of mechanical structures and equipment.
Manufacturing of mechanical parts.
Integration of mechanical systems.
Team management.
Knowledge of regulatory framework and best practice in radiation protection.
Achieving results: defining clear objectives, milestones, and deliverables before initiating work/project.
Communicating effectively: ensuring that information, procedures and decisions are appropriately documented.
Demonstrating accountability: taking responsibility for own actions and decisions.
Demonstrating flexibility: being willing to work on different projects simultaneously.
Working in teams: building and maintaining constructive and effective work relationships.
Spoken and written English, with a commitment to learn French.
Eligibility and Closing Date
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. We welcome applications from all Member States and Associate Member States.
This vacancy will be filled as soon as possible, and applications should normally reach us no later than 28.05.2026 at 23:59 CEST .
Employment Conditions
Contract type: Limited duration contract (5 years). Subject to certain conditions, holders of limited-duration contracts may apply for an indefinite position.
Working Hours: 40 hours per week
Job Flexibility: Fully Onsite
Position Requirements
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 Organization.
Shift work, when required by the needs of the Organization.
Exposure to lead.
Radiation worker, 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 grade: 3-4
Job reference: EP-CMS-IC-2026-97-LD
Field of work: Mechanical Engineering
Benchmark Job Title: Mechanical Technician
Benefits
Competitive salary (tax free), increasing in line with your years of relevant experience.
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.
Relocation package (installation grant, removal, travel expenses) depending on your individual circumstances.
Possibility to extend your contract up to 8 years + eligibility for indefinite contract tenure.
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