Fibre Optic Site Engineer

What you'll do

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. You will also be guided in acquiring knowledge of optical fibre infrastructure and installation techniques.

Your responsibilities

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;
Efficiently support and integrate with the Section Team in your daily work.

Still here? Let's make a quick check about

Your profile

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;
Your studies focused on Electronics / Electrical / Telecom.

Your skills

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;
Identifying, defining and assessing problems, taking action to address them;
Demonstrating a pro-active approach to resolving differences, addressing issues of conflict constructively, providing others with timely information;
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.

Ideal start date: 01/02/2026

Contract duration: 24 month contract

Job flexibility: Fully Onsite

Team supervision

Medical hazard

Shift work.

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

Employment conditions

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

Global Benefits at CERN

A monthly stipend between 6287-6911 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.

Let's get you ready

Be sure to meet the eligibility criteria

You are a national of a CERN Member State or Associate Member State.
By the application deadline, you have a master’s degree with 2 to 6 years of professional experience since graduation or a PhD with a maximum of 3 years of professional experience since graduation. You are not eligible with only a bachelor’s degree.
You have never had a CERN fellow or graduate contract before.
Please pay attention to the additional criteria and requirements for this specific position and mentioned above.

You will need these documents to complete your application

Your CV (English or French)
Any document you consider relevant to your application
A copy of your most relevant diploma or a certificate of achievement from your school (if you don't yet have your paper diploma)

Your CERNDepartment

The EN department provides essential engineering expertise and infrastructure systems for the design, operation, and maintenance of CERN's accelerator complex and experimental facilities.

It covers everything from mechanical engineering to infrastructure management, ensuring the smooth running of technical systems.

Overview of CERN

Discover a world where the impossible is made possible!

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 perspectives within our teams, ensuring every contribution is valued and driving our shared sense of inclusion and purpose. Diversity is a core value of CERN since its foundation, and it remains central to our mission and continued success.

If you are ready to be part of a dynamic, inclusive community pushing the boundaries of knowledge, CERN is the place where your curiosity and skills can thrive. Be part of our mission to uncover what lies at the heart of the universe! TAKE PART!

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Still have a doubt ? Here are the most frequently asked questions

What should I expect during my first week at CERN?

Your onboarding at CERN includes a comprehensive induction programme, which starts with an official welcome session at the beginning of each month. In addition, you will receive important information both before and after your arrival to ensure a smooth transition into your new role. This process is designed to help you get acquainted with CERN’s environment, your team, and the tools and systems you’ll be using.
How big would the team be?

The size of the team you'll be working with at CERN depends on the specific role and department. Some teams are small and highly specialized, while others are larger and more interdisciplinary. During the interview process, you'll have the opportunity to learn more about the team structure for the position you are applying for.
What is the working language at CERN?

The working languages at CERN are English and French. However, it is not always mandatory to speak both languages to work at CERN. We offer language training to help you acquiring the other language.
What support does CERN provide for relocation?

CERN does not offer direct assistance with relocation. However, depending on your role and specific criteria, you may be eligible for certain benefits such as an installation allowance and coverage of travel expenses to join CERN. These benefits are designed to help ease the transition when relocating to the Geneva area. For more information, please consult the “Salary, Benefits and Support“ page.
Do I need a visa to work at CERN?

Whether you need a visa to work at CERN depends on your nationality and the duration of your stay. CERN assists with the necessary visa and work permit processes for its employees and visitors. The specific requirements will be communicated to you during the recruitment process.
What would my salary be?

Salaries at CERN are determined by a structured scale. Salaries are based on your role, qualifications, and experience, and are not subject to negotiation. Specific details will be provided as your application progresses. For more information, please refer to the dedicated page.