Electrical Engineer - Power Transformers (SY-EPC-HPC-2025-291-GRAE)

Employment Type: Full-time

You will join the team working on oil-filled and cast-resin transformers for power converter applications. In the framework of the project, many oil-filled transformers will be replaced by cast-resin transformers, for environmental reasons. You will design studies for power transformers and power converter systems, redaction of technical specifications, tendering, follow-up of industrial production of transformers, factory testing and quality management, as well as activities for installation and commissioning of power transformers.

As part of the design studies, you will work on simulation models for power converter systems for the correct dimensioning of the power transformers for particle accelerator operation. In addition, you will take increasing responsibility for the maintenance activities of oil-filled and cast-resin transformers, including the supervision and coordination of contractors working at CERN. You'll be part of a team of skilled technicians and passionate engineers, responsible for the operation, maintenance, and new projects of high-power converter systems in the power range between 1 and 150 MW.

Your responsibilities:

• Electrical design studies and simulations of cast-resin transformers and their associated power converters.
• 3D mechanical design studies for transformer integration onto their transformer pits.
• Redaction of technical specifications for cast-resin transformers and participation in the procurement process.
• Management of contracts and participation in the supervision of contractors' personnel.
• Cooperation with the manufacturer for the detailed design process of transformers.
• Participation in the follow-up of the factory consolidation of large oil-filled transformers.
• Validation, type and routine testing in the factory.
• Participation in installation and commissioning of transformers.
• Participation in the supervision of consolidation of transformer pits.
• Participation in operation and maintenance.

Your profile:

• Experience in power transformers.
• Experience in power electronics.
• Experience with high-power systems, such as engineering, design, manufacturing, installation, commissioning, operation, and/or maintenance.
• Experience in design and modelling of high-power converter systems (MATLAB SIMULINK, PSIM).

Skills:

• Design and modelling of high-voltage electrical circuits and networks.
• Knowledge and application of power electronics techniques.
• Design and modelling of power electronic components and systems (MATLAB SIMULINK or equivalent).
• Construction, test and commissioning of electrical components and systems.
• Operation and maintenance of power electronic components and systems.
• Spoken and written English or French, with a commitment to learn the other language.

Eligibility criteria:

• By the application deadline, you have a maximum of two years of professional experience since graduation in Electr. Engineering / Power Electronics (or a related field) and your highest educational qualification is either a Bachelor's or Master's degree.
• You have never had a CERN fellow or graduate contract before.
• Applicants without University degree are not eligible.
• Applicants with a PhD are not eligible.

Additional Information
Job closing date: 11.01.2026 at 23:59 CET.

Contract duration: 24 months, with a possible extension up to 36 months maximum.

Job flexibility: Fully Onsite

Target start date: 01-March-2026

This position involves:

• Work in Radiation Areas.
• Interventions in underground installations.
• A valid driving licence.

Job reference: SY-EPC-HPC-2025-291-GRAE

Field of work: Electrical or Electronics Engineering

Benchmark job: 200030 - Electrical Engineer

Global Benefits

• A monthly stipend between 5196-5716 Swiss Francs per month (tax free) 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.

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