Applied Physicist

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

• It is known for its groundbreaking work in particle physics and technology, employing over 2,500 staff members and collaborating with thousands of scientists from around the world. CERN 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 position focuses on the LHCb VELO detector, specifically its operation, maintenance, and future upgrades. The successful candidate will play a crucial role during the Long Shutdown 3 (LS3) in late 2026, preparing the detector for safe operation, coordinating maintenance activities, and supporting the replacement and testing of VELO modules. The role also involves analyzing Run 3 data to enhance detector performance and simulations for Run 4, as well as contributing to VELO Upgrade II R&D activities in collaboration with CERN experts. This position requires a strong background in detector physics and programming skills, particularly in Python and C++.

Duties and Responsibilities:

• Participate in the preparation of the VELO detector for LS3, ensuring adherence to safe state procedures and intervention planning.
• Support the recommissioning of the CERN slice test setup, which includes cooling, vacuum, slow control, data acquisition (DAQ), and safety systems for module testing.
• Analyze Run 3 VELO data to characterize detector performance and improve understanding of its behavior.
• Prepare for the recommissioning of Run
• Contribute to VELO Upgrade II R&D, focusing on areas such as RF box design, vacuum systems, module design, and cooling, in collaboration with CERN experts.

Required Qualifications:
Candidates must be nationals of a CERN Member or Associate Member State and possess a professional background in Particle Physics or Detector Physics (or a related field). They should have 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. Additionally, candidates must not have previously held a CERN fellow or graduate contract.

Educational Background:
A Master's degree in Particle Physics, Detector Physics, or a related field is required, along with relevant professional experience. Alternatively, a PhD in a related field with limited post-graduation experience is acceptable.

Experience:
Candidates should have experience in commissioning and/or operating large detectors, as well as detector data analysis. Experience with commissioning laboratory test setups, including low voltage (LV), high voltage (HV), vacuum, or other associated systems is essential. Familiarity with fields at the interface between the LHC and the VELO, such as motion and safety systems, impedance, vacuum, and beam background, is also important.

Languages:
Proficiency in spoken and written English is mandatory, with a commitment to learn French being a valuable asset.

Additional Notes:
The contract duration is 24 months, with the possibility of extension up to a maximum of 36 months. The position requires a commitment of 40 hours per week and is fully onsite. The role may involve stand-by duty and work during nights, Sundays, and official holidays as required by the organization. The job reference is EP-LCB-2026-62-GRAP, and the field of work is Applied Physics. 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.