OpenStack Cloud Engineer

What you'll do

Are you passionate about cloud infrastructure and curious about how large-scale services are operated and evolved? Join CERN’s IT Cloud team and help run and develop the OpenStack-based cloud infrastructure that underpins most CERN and LHC experiment services. In this role, you will work on the systems and software that provide compute, storage, networking and automation capabilities to thousands of users across the organisation.

You will collaborate closely with experienced engineers, the upstream OpenStack community, and CERN’s diverse user communities, gaining hands-on experience operating and evolving one of the world’s largest scientific clouds. From service reliability and automation to feature development and large-scale operations, you will help deliver infrastructure that enables cutting-edge research.

If you enjoy solving complex technical challenges, contributing to open-source software, and working with infrastructure at scale, come join us!

Your responsibilities

Run and help evolve CERN IT's OpenStack-based cloud infrastructure.
Contribute to the operation and development of cloud services, including compute, storage, networking and related infrastructure components.
Develop and maintain automation and tooling using Python and configuration management systems.
Work closely with other IT teams and user communities to design and integrate new capabilities and services.
Contribute bug fixes and improvements upstream, leveraging CERN's strong links with the OpenStack open-source community.
Participate in troubleshooting and performance optimisation of large-scale distributed systems.
Further enhance the service's automation to ensure scalability and manageability.

Still here? Let's make a quick check about

Your profile

Experience administering or working with Linux systems in a server or data-centre environment.
Experience writing Python scripts or applications for automation or systems tasks.
Familiarity with cloud platforms, virtualisation technologies or distributed systems is a plus.
Experience with configuration management tools such as Puppet or Ansible is a plus.
Experience with container technologies, CI/CD systems or software-defined networking is a plus.
Contributions to open-source projects or upstream communities are a plus.
Your studies focused on Computer Science or a related field.

Your skills

Strong knowledge of the Linux operating system.
Experience with git version control.
Programming experience in Python.
Interest in cloud infrastructure and large-scale distributed systems.
Familiarity with configuration management systems (e.g. Puppet or Ansible) is a plus.
Understanding of networking concepts and storage technologies is a plus.
Ability to collaborate in a multidisciplinary, international team and communicate clearly.
Spoken and written English, with a commitment to learn French.

Ideal start date: 01/11/2026

Contract duration (in months): 24

Job flexibility: Hybrid

Global Benefits at CERN

A monthly net stipend between 5266-5793 Swiss Francs per month 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. 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.
By the application deadline, you have a maximum of 2 years of professional experience since graduation in the respective field and your highest educational qualification is either a bachelor’s or master’s degree. You must have a university degree and can’t hold a PhD.
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)
A copy of your most relevant diploma or a certificate of achievement from your school (if you don't yet have your paper diploma)
Any document you consider relevant to your application

Your CERNDepartment

The IT Department designs, operates, and evolves CERN’s core computing and digital infrastructure. It provides the large-scale data processing, storage, networking, and collaboration services that enable CERN’s scientific programme. The Department supports the LHC and non-LHC experiments, accelerator systems, and the wider CERN community, while advancing new computing technologies through research, development, and strategic partnerships.

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.