ATLAS Detector Installation Technician – Junior Mechanical

About the role

The EP-ATL-PO section at CERN is responsible for the upgrade and maintenance of the ATLAS detector during Long Shutdown 3. As a Junior Mechanical Technician you will assist experienced engineers in the mechanical installation, integration and movement of detector components, gaining hands‑on experience in a world‑leading experimental physics environment.

Key responsibilities

• Participate in large‑scale detector movements and installation of access platforms in the experimental cavern.
• Support sub‑detector installation activities, including handling, transport and precise positioning using lifting and alignment techniques.
• Prepare work areas, set up tooling and provide logistical support for detector interventions.
• Read and interpret mechanical drawings, perform basic dimensional checks and report progress to supervising engineers.
• Manufacture simple parts and tooling using conventional machining (drilling, milling, turning) when required.

Required profile

• Initial hands‑on experience in mechanical assembly, fitting or maintenance.
• Ability to read mechanical drawings, blueprints and 2D/3D CAD models.
• Basic metrology skills (calipers, gauges, dimensional inspection tools).
• Awareness of occupational health and safety principles in workshop and industrial settings.
• National of a CERN Member or Associate Member State with up to two years of professional experience since graduation in Mechanical Engineering or a related field.

Required skills

• Mechanical drawing interpretation
• 2D/3D CAD model reading
• Conventional machining (drilling, milling, turning)
• Metrology tools usage (calipers, gauges)
• Hand and power tool operation
• Safety procedures and occupational health compliance

What we offer

• 24‑month fixed‑term contract with possible extension up to 36 months.
• Full‑time onsite work (40 hours/week) at CERN, Geneva.
• Opportunity to work in a cutting‑edge particle‑physics environment and develop technical expertise.