Mechanical Engineer

Job Posting Organization:
CERN, the European Organization for Nuclear Research, is a leading research institution established in 195

• It is located in Geneva, Switzerland, and is known for its groundbreaking work in particle physics. CERN employs over 2,500 staff members and collaborates with thousands of scientists from around the world, representing more than 100 nationalities. The organization operates in multiple countries and is dedicated to pushing the frontiers of science and technology, fostering an environment of innovation and collaboration.

Job Overview:
The Mechanical Engineer position at CERN involves working on the Tristron, a high-efficiency RF power source essential for the Future Circular Collider (FCC). The role requires participation in research and development (R&D) for manufacturing processes, collaborating closely with design and engineering teams to finalize designs and oversee manufacturing processes. The Mechanical and Materials Engineering (MME) Group, where this position is located, is known for its expertise in designing, manufacturing, and assembling advanced accelerator components. The Engineering Department is committed to providing innovative research tools for the global physics community, making this role critical for advancing cutting-edge technology in the field of particle physics.

Duties and Responsibilities:
The responsibilities of the Mechanical Engineer include participating in the R&D and fabrication follow-up of Tristron prototypes. This involves engaging in technical discussions and collaborating with experts in various fields such as machining, vacuum brazing, beam welding, metrology, materials laboratory, and surface treatment. Specific tasks include:

• Triode Development: Focus on the mechanical realization and development of critical Triode components, including the Anode, Cathode, and Grid.
• Laser Processing Development for the Grid: Oversee the development of laser micro-machining and other advanced manufacturing technologies for grid manufacturing, utilizing specialized materials.
• Feasibility Studies for High-Precision Machining: Achieve sub-10 micron tolerances, required surface roughness, and precise parts fit-up.
• Advanced Joining & Materials Engineering: Define and follow up on feasibility studies for vacuum brazing cycles and/or electron beam welding (EBW) procedures for dissimilar materials, ensuring the metallurgical integrity of joints.
• Design-for-Manufacturing (DfM): Provide feedback to RF designers and the MME Design Office to optimize designs for manufacturing based on feasibility studies.
• Quality Follow-up & Documentation: Define QA/QC plans, ensure R&D traceability and documentation, and record joining procedures with concerned services.
• Manufacturing Strategy: Participate in defining the complete fabrication sequence for the Tristron with the methods office.

Required Qualifications:
Candidates must have a professional background in Mechanical, Manufacturing, or Materials Engineering (or a related field). They should possess experience in mechanical components assembly and a good understanding of fabrication techniques such as vacuum brazing and electron beam welding. Knowledge of fabrication methods for high-precision mechanical components or RF structures is essential. Familiarity with metallic and non-metallic materials, as well as experience with technical drawings and CAD tools (preferably CATIA), is also required. Initial experience with quality management processes and knowledge of quality control procedures applicable to mechanical production are important qualifications for this role.

Educational Background:
The ideal candidate should hold either a Master's degree 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:
The position requires candidates to have a professional background in Mechanical, Manufacturing, or Materials Engineering, with specific experience in mechanical components assembly and fabrication techniques. A Master's degree with 2 to 6 years of relevant experience or a PhD with up to 3 years of experience is necessary, indicating a need for a solid foundation in engineering principles and practical applications in the field.

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

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 position is fully onsite. The target start date is July 1, 202

• The job reference is EN-MME-FW-2026-79-GRAP, and it falls under the field of Mechanical Engineering. The compensation includes a monthly stipend between 6372-7004 Swiss Francs (tax-free), 30 days of paid leave per year, comprehensive health insurance coverage, family allowances, a relocation package, and opportunities for on-the-job and formal training, including language classes.