Mechanical Technician – Cooling Systems

About the role

The EP-ATL-PO section at CERN is preparing for Long Shutdown 3 (2026‑2030). As a Mechanical Technician you will support the installation, testing, commissioning and operation of complex cooling systems that use water, CO₂, nitrogen and other process gases for the upgraded ATLAS detector.

Key responsibilities

• Remove, disassemble, and re‑install cooling system components.
• Manufacture, test and install piping, manifold boxes and related hardware.
• Perform maintenance, repairs, testing and modifications on major cooling equipment.
• Troubleshoot issues and develop repair solutions.
• Implement safety measures on all work sites.
• Prepare and execute acceptance tests.

Required profile

• Initial experience in piping system assembly and basic metalwork.
• Basic knowledge of cooling equipment and fluid handling.
• Some experience with basic machining and electrical wiring is a plus.
• Maximum two years of professional experience since graduation in electromechanical engineering or related field.
• Eligibility: national of a CERN Member or Associate Member State, no prior CERN fellow or graduate contract.

Required skills

• Mechanical assembly of cooling structures.
• Piping system assembly and manifold fabrication.
• Reading and interpreting Piping & Instrumentation Diagrams (P&ID).
• Basic metalworking and machining techniques.
• Handling of water, CO₂, nitrogen and process gases.
• Fundamental electrical wiring and system connections.

What we offer

• Fixed‑term contract of 24 months, extendable up to 36 months.
• Full‑time schedule (40 hours/week) on‑site at CERN.
• Opportunity to work in a high‑tech, radiation‑area environment on a world‑leading particle‑physics experiment.
• Professional development in electromechanical and cryogenic systems.