Mechanical Technician for CMS

European Organization for Nuclear Research

Location:
Geneva, Switzerland
Grade:
IC
Category:
General Staff
Posted Sep 18, 2026Apply by Dec 10, 2026 (49d left)
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We are recruiting two early-career graduates for Mechanical Technician positions within the CMS experiment. The roles involve hands-on mechanical work supporting the refurbishment of the electromagnetic calorimeter and mechanical activities for the CMS detector and its infrastructure.

Responsibilities

  • Participate in the extraction and insertion of the ECAL supermodules, including the preparation, installation, and removal of the required tooling.
  • Carry out mechanical operations during the refurbishment of the supermodules, including the replacement of cooling fittings.
  • Support the installation of ECAL services and electronics and assist with related logistics.
  • Participate in mechanical work for the upgrade, maintenance, and repair of the CMS detector and its associated infrastructure.
  • Manufacture mechanical parts and contribute to on-site assembly, installation, alignment, and repair activities.
  • Support the development of tooling and the preparation or modification of technical drawings using drafting software such as CATIA.
  • Participate in heavy-lifting and movement operations using equipment such as strand jacks, air pads, and hydraulic jacks, and support regular checks and maintenance of this equipment.

Requirements

  • You are a national of a CERN Member State or Associate Member State.
  • By the application deadline, you have a maximum of 2 years of professional experience since graduation in a technical or administrative field.
  • Your highest educational qualification is a general secondary education diploma or a shorter non-university degree.
  • You cannot hold a bachelor’s degree, master’s degree or PhD.
  • You have never had a CERN fellow or graduate contract before.
  • Initial hands-on experience in the construction and assembly of mechanical components and structures.
  • Experience in mechanical equipment or detector assembly, including cooling connections, pressure testing, or leak detection.
  • Experience using machine tools and hand tools for mechanical manufacturing activities.
  • Experience with mechanical systems and the handling of large, heavy, or fragile equipment.
  • Experience with drafting software, such as CATIA.
  • Your studies focused on Mechanics or related.
  • Knowledge of manufacturing techniques for mechanical parts.
  • Experience in the assembly and integration of mechanical structures, equipment, and systems.
  • Knowledge of the operation and maintenance of cooling-water systems.
  • Experience in the safe operation of mechanical handling systems and the application of safety procedures related to heavy machinery and mechanical operations.
  • Problem-solving skills and attention to detail.
  • Ability to work both independently and collaboratively within a multidisciplinary team.
  • Clear communication skills and the ability to follow technical instructions accurately.
  • Spoken and written English or French, with a commitment to learn the other language
  • A valid driving licence.

Skills

  • Mechanical Systems Assembly
  • Mechanical equipment handling
  • Maintenance of cooling systems
  • Pressure Testing
  • Leak Detection
  • Machine tool operation
  • Hand Tool Operation
  • Mechanical Manufacturing
  • CATIA drafting software
  • Mechanical structure integration
  • Manufacturing Techniques Development
  • Mechanical handling systems
  • Safety procedures for heavy machinery
  • Technical Problem Solving
  • Technical instruction compliance
  • Multidisciplinary Team Collaboration
  • English Communication Skills
  • French Communication
  • Driving License

Languages

English, French