Mechanical Systems Engineer


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


Are you interested in the challenges of designing, operating and maintaining reliable mechanical complex systems? Do you want to participate in the consolidation and upgrade of beam intercepting devices  to cope with the most demanding requirements of forefront physics experiments? Take a leading role in the lifecycle of critical equipment. Take part!

As a Mechanical Systems Engineer you will join:

The Beams (BE) Department that provides CERN with the specific competencies required for the conception, design, survey, alignment, control and operation of accelerators, accelerator test facilities, secondary beam lines and experimental areas.

The Experimental Areas (EA) Group which is responsible for planning and coordinating all activities in the CERN Experimental Areas and associated facilities. The Group provides support to the diverse experiments that use the CERN accelerator complex, in particular their preparation, integration, installation, and operation, as well as the design, installation, and maintenance of the beam transport lines used to provide the array of particles required for these experiments. 


As a Mechanical Systems engineer within the EA Group of the BE Department, you will:

  • Participate in projects from their definition to installation.
  • Design, integrate, and follow-up the procurement, production and installation of complex mechanical, electro-mechanical and mechatronics systems.
  • Write engineering specifications and produce conceptual designs ensuring they satisfy user needs by communicating effectively with physicists, engineers and technicians.
  • Review the operation and maintenance of existing systems, assessing their performance and where necessary proposing performance enhancing solutions.
  • Apply engineering principles in areas such as remote handling concepts and waste optimisation.



Master's degree or equivalent relevant experience in the field of Mechanical Engineering or a related field.


  • Proven experience of performing and documenting mechanical, thermo-dynamical and stress analysis.
  • Proven experience with design and integration tools.
  • Proven experience working with safety norms (RCC-MX or EUROCODE, PED).
  • Demonstrated success in the application of engineering science and technology at a research or industrial environment. This includes applying principles, techniques and procedures on equipment design and construction of prototypes or series.
  • Initial experience in project management: planning and scheduling, costing and budgeting, project risk management, project progress monitoring.
  • Experience in vacuum system design and calculations.

Technical competencies:

  • Knowledge and use of standard vacuum components and piping
  • Design and analysis of machines: use of CATIA, ANSYS or their equivalent.
  • Knowledge and application of manufacturing methods and work preparation.

Behavioural competencies:

  • Communicating effectively: Expressing opinions, ideas and suggestions with conviction and in a logical/structured manner; keeping to the point. Delivering presentations in a structured and clear way; adjusting style and content to the audience; responding calmly and confidently to questions.
  • Demonstrating accountability: Taking responsibility for own actions and decisions.
  • Achieving results: having a structured and organised approach towards work; being able to set priorities and plan tasks with results in mind.
  • Solving problems: Identifying, defining and assessing problems, taking action to address them.
  • Working in teams: Contributing to promoting a positive atmosphere in the team through an optimistic and constructive attitude; addressing issues. Sharing and letting others participate in own work/project; encouraging team development.

Language skills:

Spoken and written English or French: ability to understand and speak one of the two languages in professional contexts. Ability to draw-up technical specifications and/or scientific reports and to make oral presentations in at least one of the two languages.


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 12 midday 5th October 2022.

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:

  • 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.

Job grade: 6-7

Job reference: BE-EA-EC-2022-98-LD

Benchmark Job Title: Mechanical Engineer