Mechanical/Electromechanical Technician (ATLAS ITk Upgrade) (EP-DT-EO-2026-215-LD)

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.

Introduction

The CERN ATLAS Team plays a major role in the construction of the future silicon ATLAS Inner Tracker (ITk). In particular, the CERN Detector Technologies (DT) team focuses on the realisation of the Pixel Outer Barrel for the ITk. Our activities include the design, prototyping and assembly of the support structures and tooling as well as the final detector integration, installation and testing. As a mechanical/electromechanical technician in the CERN-DT Team, you will join the Engineering Office Section (EP-DT-EO) and work closely with personnel from the ATLAS Group (EP-ATL) and the Technical Coordination Team of the ATLAS Experiment in the design and construction of the ATLAS ITk Pixel Outer Barrel.

Functions

• Participate in the production, testing and installation of the Pixel Outer System services and their support structures (e.g. trolleys).
• Support the design, manufacturing and installation of temporary services and infrastructure for testing during the integration of the Pixel Detector.
• Participate hands-on in the integration of the Pixel Outer System and its insertion into ITk in the SR1 cleanroom, contributing to the development and fabrication of the corresponding tooling.
• Participate in the ITk installation in the ATLAS cavern, supporting preparation of Pixel services for installation as well as connections after insertion.
• Document manufacturing and installation procedures as well QC information of tools and production parts to ensure traceability.

Higher technical diploma or equivalent relevant experience in the field of Precision Mechanics or a related field.

Experience:

• Demonstrated experience in conventional precision machining of metallic and non-metallic parts, using both conventional and non-conventional methods.
• Good understanding of mechanical and electrical drawings, including geometrical tolerance specifications.
• Demonstrated experience in the assembly of complex, high precision mechanical systems with high quality standards.
• Proven experience in manufacturing and installation of cable bundles and harnesses.
• Proven experience with of structural joining techniques, particularly adhesive bonding and orbital welding.

Experience in the following areas would be considered an asset:

• Previous experience in computer numerically controlled (CNC) machines.
• Experience in the use of CAD software (ideally Catia V5) for the 2D and 3D modelling.
• Previous experience in CAD-CAM programming (preferably using WORKNC).

Technical competencies:

• Manufacturing of mechanical parts.
• Knowledge and application of joining techniques, glueing, welding.
• Production of 2D drawings and 3D models (ISO dimensioning, tolerancing).
• Programming and use of CNC machine-tools and machining centres.
• Precision assembly of mechanical structures and equipment

Behavioural competencies:

• Achieving Results: delivering high quality work on time and fulfilling expectations.
• Demonstrating Flexibility: adapting quickly and resourcefully to shifting priorities and requirements.
• Working in Teams: working well in groups and readily fitting into a team; participating fully and taking an active role in team activities.
• Solving Problems: adopting a pragmatic approach; understanding the value of adopting generic rather than ‘gold -plated' technical solutions.
• Managing Self: working well autonomously; taking on activities and tasks without prompting.

Language skills:

Spoken and written English or French, with a commitment to learn the other language.

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 29.11.2026 at 23:59 CET.

Employment Conditions

Contract type: Limited duration contract (3 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

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 Organization.

Job grade: 3-4

Job reference: EP-DT-EO-2026-215-LD

Field of work: Mechanical Engineering

Benchmark Job Title: Mechanical Technician

Global Benefits

• A 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.
• A 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.

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!

More information about us, here: careers.cern