Fibre Optic Site Engineer; EN-EL-FO--GRAP

Great technology needs great people! Join the Fibre Optics Section in the Electrical Engineering Group (EN-EL) and actively participate in the design, preparation, supervision and validation of optical fibre installations. The Engineering Department (EN) pushes forward the limits of technology so that physicists can carry out their research.

The Fibre Optics Section in the Electrical Engineering Group is responsible for the management and operation of the CERN optical fibre network. Its main missions are to operate, maintain, consolidate and upgrade the fibre infrastructure connecting CERN buildings, accelerators equipment and particle detectors.

Your main tasks will be related to HL-LHC project and CERN's Personnel Safety System Consolidation (PSS-CONS) program.

• Establish installation requirements for optical fibres.
• Prepare database registration and technical work files for the contractors.
• Contribute in drafting work planning and follow up with the contractors.
• Organise and manage worksite meetings.
• Verify the quality of the work performed by contractors and validate optical fibre installations.
• Organise and execute fibre patching and optical measurements as required.
• Organise maintenance and repair activities when required.
• Prepare work progress reports.
• Carry out studies on infrastructure consolidation and upgrades.

The candidate will be guided in acquiring knowledge of optical fibre infrastructure and installation technics. The ability of efficiently supporting and integrating with the Section Team will be key in the daily work.

• Proven ability in drawing up technical documentation, including the use of database tools, and reporting.
• Experience in the preparation of work files, as well as in work supervision and acceptance of cabling installations.
• Experience in cable installation would be an asset.

• Basic knowledge of fibre optics and their applications.
• Ability to work independently, supervising multiple projects and competing priorities to meet scheduled completion dates.
• Detail-oriented and capable of maintaining thorough technical documentation.
• Willingness to work on optical fibre installations on-site.
• Solving Problems: identifying, defining and assessing problems, taking action to address them.
• Communicating Effectively: demonstrating a pro-active approach to resolving differences, addressing issues of conflict constructively, providing others with timely information.
• Working in Teams: contributing to promoting a positive atmosphere in the team through an optimistic and constructive attitude; addressing issues.
• Spoken and written English, with a commitment to learn French.

• You are a national of a CERN Member or Associate Member State.
  • a
    Master's degree with 2 to 6 years of post-graduation professional experience;
  • or a
    PhD with no more than 3 years of post-graduation professional experience.
• You have never had a CERN fellow or graduate contract before.

Additional Information

Job closing date: 11.01.2026 at 23:50 CET.

Contract duration: 24 months, with a possible extension up to 36 months maximum.

Working hours:

40 hours per week

Job flexibility:
Fully Onsite

Target start date: 01-February-2026

• Work in Radiation Areas.
• Interventions in underground installations.
• Residence in the immediate vicinity of the Organization's installations.
• A valid driving licence.
• Work during nights, Sundays and official holidays, when required by the needs of the Organization.
• Shift work.

Given the occupational health risks associated with this position, the selected candidate must obtain medical clearance before a contract offer is confirmed.

Job reference: EN-EL-FO--GRAP

Field of work:
Electrical or Electronics Engineering

Benchmark job: 200050 - Electronics Engineer

• A monthly stipend between  Swiss Francs per month (tax free) depending on your degree.
• 30 days of paid leave per year plus 2 weeks annual closure.
• Coverage by CERN’s comprehensive health insurance scheme (for yourself, your spouse and children), and membership of the CERN Pension Fund.
• Family, child and infant monthly allowances depending on your individual circumstances.
• A relocation package (installation grant and travel expenses) depending on your individual circumstances.
• Possibility to extend your contract up to 36 months.
• On-the-job and formal training including language classes.

At CERN, the European Organization for Nuclear Research, we are pushing the frontiers of science and technology. Our groundbreaking work brings together not only physicists but also a diverse range of professionals from engineering, technical, scientific, and administrative fields. Together, we foster an environment where innovation and collaboration thrive.

Every day, we face exciting new challenges and opportunities to contribute to cutting-edge research that shapes our understanding of the universe. We meet these challenges through the diverse…