Mechanical Engineer

Mechanical Engineer

European Organization for Nuclear Research (CERN)

September 19, 2025November 3, 2025GenevaSwitzerland
Job Description
Job Posting Organization:
CERN, the European Organization for Nuclear Research, was established in 1954 and is one of the world's largest and most respected centres for scientific research. With over 2,500 employees and thousands of scientists from around the globe, CERN operates in multiple countries and is dedicated to understanding the fundamental structure of the universe. The organization is known for its cutting-edge research in particle physics, utilizing the world's largest and most complex scientific instruments to study the basic constituents of matter. CERN's mission emphasizes diversity and collaboration among its workforce, which is essential for its success in scientific discovery.

Job Overview:
The Mechanical Engineer position within CERN's Cryogenics (TE-CRG) group is focused on the design and production of a prototype detector module for the ALLEGRO ECAL Project. This project aims to develop a general-purpose detector concept for the future FCC-ee accelerator, which includes a noble-liquid electromagnetic calorimeter as a central component. The role requires the engineer to finalize engineering design studies, perform thermo-mechanical calculations, coordinate interfaces between prototype components, produce and assemble prototype components, and conduct quality control and assembly tests to validate the design. The engineer will work autonomously while collaborating with physicists, engineers, and technicians across various domains, and will be responsible for preparing clear technical reports and presentations to document their work.

Duties and Responsibilities:
The duties and responsibilities of the Mechanical Engineer include:
  • Finalizing engineering design studies for the ECAL prototype.
  • Carrying out thermo-mechanical calculations to ensure the integrity and functionality of the prototype.
  • Coordinating interfaces between different prototype components to ensure seamless integration.
  • Producing the necessary prototype components using appropriate manufacturing techniques.
  • Assembling the prototype and ensuring all components fit and function as intended.
  • Performing quality control checks and assembly tests to validate the design and functionality of the prototype.
  • Contributing to the final production and assembly of the prototype for testing in a particle beam environment.
  • Collaborating with multidisciplinary teams, including physicists and engineers, to achieve project goals.
  • Preparing and presenting technical reports and documentation of the work conducted.

Required Qualifications:
Candidates must possess a professional background in Mechanical Engineering or a related field. Essential skills include proven experience with finite element analysis (FEA) software for thermal and structural simulations, the ability to analyze and interpret simulation data, knowledge of design codes and compliance verification for mechanical equipment, and experience with 3D CAD software. Candidates should also be able to produce accurate 2D drawings and 3D models, with a solid understanding of ISO dimensioning and tolerancing standards. The ability to work autonomously and flexibly in a multidisciplinary environment is crucial. Desirable skills include initial experience with the assembly of mechanical structures and equipment.

Educational Background:
The position requires candidates to have either a Master's degree in Mechanical Engineering or a related field with 2 to 6 years of post-graduation professional experience, or a PhD with no more than 3 years of post-graduation professional experience. Candidates must also be nationals of a CERN Member or Associate Member State and should not have previously held a CERN fellow or graduate contract.

Experience:
Candidates should have a professional background in Mechanical Engineering, with a minimum of 2 years and a maximum of 6 years of post-graduation experience if holding a Master's degree, or up to 3 years of post-graduation experience if holding a PhD. This experience should ideally include work related to mechanical design, finite element analysis, and prototype development.

Languages:
Fluency in spoken and written English is mandatory, and candidates should demonstrate a commitment to learning French, which is considered a valuable asset for the position.

Additional Notes:
The contract duration for this position is 24 months, with the possibility of extension up to a maximum of 36 months. The working hours are set at 40 hours per week, and the target start date for the position is January 1, 202
  • The role may require work during nights, Sundays, and official holidays, depending on the needs of the organization. The compensation includes a monthly stipend ranging from 6287 to 6911 Swiss Francs (net of tax), comprehensive health coverage for the employee and their family, and various allowances depending on individual circumstances. Additionally, employees are entitled to 30 days of paid leave per year and will have access to on-the-job and formal training opportunities, as well as in-house language courses.
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