Technician for cooling and ventilation systems (EN-CV-LHC-2023-26-LD)

  • Contract

Company Description

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. Find out more on

Job Description


The Engineering Department (EN) pushes forward the limits of technology so that physicists can carry out their research. Within the cooling and ventilation (CV) group of the EN department, you will join the LHC Section, which is in charge of the operation and maintenance of the cooling and ventilation systems of CERN’s experimental areas, including the ones dedicated to detectors. The activity includes the work site supervision for installation work and commissioning of new systems, upgrade of existing systems and consolidation of old systems.

Are you a qualified technician, specialised in industrial cooling and refrigeration installations? Contribute your skill and experience to the operation and maintenance of highly complex cooling plants in a unique environment hosting some of the world’s most complex technical installations. Join CERN’s Cooling and Ventilation operation team. Take part!


As a Technician, you will take part in the operation, maintenance and modification works of cooling systems that are essential for the operation of CERN scientific facilities.

You will:

  • Plan (by using the CMMS system), coordinate, supervise, check and perform preventive and corrective maintenance activities on the cooling and ventilation plant, in particular on EN-CV`s technical infrastructure including water-cooling stations and distribution networks; HVAC systems; compressed air, refrigeration systems and demineralized water production and distribution plants.
  • Perform operation activities to ensure appropriate running of these systems.
  • Ensure regular liaison with users for all matters related to these systems.
  • Propose and define the most appropriate solution to meet user needs in case of modification or renovation works.
  • Technically coordinate contractors’ maintenance and installation work in compliance with contractual clauses and technical standards.
  • Contribute to projects from the design phase until test and commissioning of new detector cooling systems.
  • Write technical reports and notes.
  • Ensuring that the technical documentation is kept up-to-date and compliant with the quality standards.
  • Ensure the respect of safety rules for all interventions.
  • Participate to the stand-by service.


Higher technical diploma or equivalent relevant experience in the field of mechanics, electro-mechanics or a related field.


  • Experience in maintenance, operation and installation work on cooling and ventilation systems.
  • Experience in the technical coordination of external contractors.
  • Experience in the use of CMMS tools.
  • Experience in low voltage electrical systems.
  • Initial experience in compressed air systems.
  • Initial experience in refrigeration systems.

Technical competencies:

  • Operation and maintenance of cooling water systems: operation, monitoring and maintenance of water-cooling stations and distribution networks, HVAC systems and networks, compressed air, refrigeration systems as well as demineralized water production and distribution plants.
  • Organisation, planning and control: organization, planning, coordination and technical supervision of construction, consolidation, and maintenance works of such installations.
  • Contract management: in particular technical supervision of contracts.
  • Organisation, planning and control: coordination of activities involving different technical fields (electricity, civil engineering, heavy handling etc.).
  • Operation and maintenance of electromechanical equipment and systems: lV network and switchboards.

Behavioural competencies:

  • Managing Self: working well autonomously; taking on activities and tasks without prompting
  • Working in Teams: working well in groups and readily fitting into a team; participating fully and taking an active role in team activities
  • Demonstrating Flexibility: readily accepting new tasks or work/projects Adapting quickly and resourcefully to shifting priorities and requirements
  • Solving Problems: identifying, defining and assessing problems, taking action to address them Adopting a pragmatic approach; understanding the value of adopting generic rather than ‘gold -plated' technical solutions
  • Communicating Effectively: providing others with timely information Ensuring that information, procedures and decisions are appropriately documented

Language skills:

Spoken and written English or French: ability to understand and speak in professional contexts. Ability to draw up technical specifications and to make oral presentations in at least one of the two languages and an undertaking to acquire the other language rapidly.

Additional Information

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 09.10.2023 at 23:55 CET.

Employment Conditions

Contract type: Limited duration contract (5 years). Subject to certain conditions, holders of limited-duration contracts may apply for an indefinite position.

These functions require:

  • Participation in a regular stand-by duty, including nights, Sundays and official holidays.
  • Work in Radiation Areas.
  • Interventions in underground installations.
  • A valid driving licence is required.
  • Work during nights, Sundays and official holidays, when required by the needs of the Organization.
  • Shift work, when required by the needs of the Organization.
  • Work in confined spaces. 
  • Work at heights.

Job grade: 3-4

Job reference: EN-CV-LHC-2023-26-LD

Benchmark Job Title: Electromechanical Technician

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