System Administrator

What you'll do

As a skilled and experienced Linux System Administrator managing critical server hardware in CERN’s accelerator data centre from procurement to installation, configuration and operation, you will contribute to the unique challenge of making CERN’s particle accelerators function in an efficient and robust manner. You will join the Controls Software & Services group, working on the computing infrastructure needed to run the largest particle physics laboratory in the world.

The 24/7 availability of core control system services is critical to the operation of CERN’s particle accelerators, enabling the organization to fulfil its central mission. Our team helps make this a success through the development, operation and evolution of the computing infrastructure in data centres and control rooms used to run the accelerator facilities.

You will have the opportunity to join a passionate system administration team and influence the evolution of this complex and challenging infrastructure, imprinting your remarkable engineering skills on mission-critical solutions for CERN.

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Your responsibilities

System administration tasks for the Linux computers connected to the accelerator control system (control room consoles, data centre servers, real-time embedded platforms and virtual machines).
Investigation, diagnosis, and resolution of operational problems in collaboration with end-users ranging from equipment specialists to operations teams.
Management of data centre infrastructure, including servers, racks and their relationships with networking, powering and cooling.
Management of desktop computers in control rooms and technical buildings.
Management of networked data-storage systems, ensuring that they are effectively backed up.
Planning and coordination of annual installation work and replacement of obsolete equipment, in collaboration with other members of the system administration team.
Close collaboration with engineers from the IT Department responsible for the general CERN IT infrastructure.
Participation in the definition of hardware specifications for server and desktop computers as part of their procurement processes.

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Your profile

Knowledge of the Linux operating system and experience with its administration.
Experience in the operation of computing infrastructures in a data centre environment.
Experience of installation and management of commercial server platforms.
Experience of configuration management tools such as Ansible, Puppet, or similar and a version control system such as Git would be advantageous.
Bachelor's degree or equivalent relevant experience in the field of Computer Science or a related field.

Your skills

Installation, operation and maintenance (preventive and corrective) of computing systems.
Knowledge of operating systems: Specifically Linux.
Operation and maintenance (preventive and corrective) of storage systems.
Operation and maintenance of networks.
Has a structured and organised approach towards work; is able to set priorities and plan tasks with results in mind.
Expresses opinions, ideas and suggestions with conviction and in a logical/structured manner; keeps to the point.
Understands when teamwork is required to achieve the best results; includes others accordingly and shares information.
Adapts quickly and resourcefully to shifting priorities and requirements.
Keeps up-to-date with developments in own field of expertise and readily absorbs new information.
Spoken and written English, with a commitment to learn French.

Ideal start date: 01/10/2026

Contract duration (in months): 60

Grade range: 4-5

Benchmark job: 301130 - Computing Technical Engineer

Job flexibility: Fully Onsite

Employment conditions

A valid driving licence.
Stand-by duty, when required by the needs of the Organization.
Work in Radiation Areas.
Interventions in underground installations.

Global Benefits at CERN

A minimum net entry-salary of 7006 Swiss Francs per month, increasing in line with your years of relevant experience.
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, removal, travel expenses) depending on your individual circumstances.
Possibility to extend your contract up to 8 years + eligibility for indefinite contract tenure.

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. Currently, we cannot consider applications from Pakistani and Lithuanian nationals for positions with a 2026 start date, as the ceiling defined under Article II.5 of the Associate Membership Agreement has been reached.
You have relevant qualifications and professional experience.
If you have previously held a Staff contract at CERN, you will not be eligible for these positions.
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

Your CERNDepartment

The BE department is at the heart of CERN's accelerator complex.

Its mission is to lead the development, construction, and operation of advanced particle accelerators, and to provide cutting-edge technology solutions that enable new discoveries in fundamental physics. Committed to promoting a culture of excellence, creativity and collaboration, individuals from diverse backgrounds contribute to the advancement of science and technology, as well as engaging in scientific education, outreach, and broader knowledge and technology transfer initiatives.

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.