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 support experienced engineers in the installation, integration and movement of detector components, gaining hands‑on experience in a world‑leading experimental physics environment.

Key responsibilities

• Assist in large‑scale ATLAS detector movements and the installation of access platforms within 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 parts and tooling using conventional machining methods such as drilling, milling and turning when required.

Required profile

• Maximum two years of professional experience in mechanical engineering or a related field since graduation.
• National of a CERN Member or Associate Member State.
• Possession of a valid driving licence.
• Willingness to work in radiation areas, underground installations and to perform night, weekend or holiday shifts as needed.

Required skills

• Interpretation of mechanical drawings, blueprints and 2D/3D CAD models.
• Basic machining techniques (drilling, milling, turning) and workshop practices.
• Metrology using calipers, gauges and dimensional inspection tools.
• Use of standard hand and power tools for mechanical operations.
• Awareness of occupational health and safety procedures.
• Documentation of work performed and adherence to technical specifications.

What we offer

• Fixed‑term contract of 24 months, extendable up to 36 months.
• Full‑time schedule (40 hours per week) on‑site at CERN.
• Opportunity to work on a cutting‑edge particle‑physics experiment.
• Professional development in a multinational, multidisciplinary environment.