Applied Physicist

Applied Physicist

European Organization for Nuclear Research (CERN)

December 22, 2025February 5, 2026GenevaSwitzerland
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 centers for scientific research. With over 2,500 employees and thousands of scientists from around the globe, CERN operates in multiple countries, primarily in Europe. The organization is dedicated to pushing the boundaries of science and technology, fostering an environment where innovation and collaboration thrive. CERN's mission is to uncover the fundamental structure of the universe, and it is known for its groundbreaking work in particle physics, including the Large Hadron Collider, which has made significant contributions to our understanding of the universe.

Job Overview:
The position of Applied Physicist at CERN involves contributing to the design and development of laser and optical systems for the Advanced Wakefield Accelerator Experiment (AWAKE). This role focuses on the integration of laser, opto-mechanical, and optical control systems, which are crucial for efficiently ionizing 10-meter-long rubidium plasma columns and synchronizing multiple laser and charged particle beams with femtosecond accuracy. The successful candidate will be responsible for conducting optical simulations, designing and prototyping opto-mechanical systems, and ensuring the reliability of these systems under stringent operational constraints. Collaboration with multidisciplinary teams is essential, as the role requires working closely with colleagues in optics, lasers, and intelligent control systems, as well as documenting work for future operations and maintenance of AWAKE.

Duties and Responsibilities:
The duties and responsibilities of the Applied Physicist include: designing optical systems for high-precision measurement, imaging, and alignment; performing research studies to ensure system performance under realistic conditions; conducting optical simulations using relevant software tools; designing and prototyping opto-mechanical assemblies; ensuring optical designs support alignment and stability; collaborating with control systems engineers for integration of actuators and sensors; documenting design and test plans; assisting in the installation and maintenance of optical systems; and potentially engaging in firmware and software calibration.

Required Qualifications:
Candidates must possess a degree in Optical Engineering, Electrical Engineering, or Applied Physics. Hands-on experience with ultrafast optical systems is essential, along with experience in the design and simulation of such systems. Proficiency in optical design software like Zemax or Code V is required, and familiarity with control and vacuum systems, sensors, and feedback loops is considered an asset. The ideal candidate should be a motivated problem-solver, capable of working independently on complex tasks, and should be an effective collaborator in a multidisciplinary team environment.

Educational Background:
The educational background required for this position includes a Master's degree in Applied Physics 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:
The level of experience needed for this position includes hands-on experience operating ultrafast optical systems, as well as proven ability to integrate optical subsystems into larger experimental setups. Candidates should have experience in designing and aligning complex optical systems, and desirable experience includes working with multi-terawatt or high-energy laser systems, as well as familiarity with ultrafast lasers and nonlinear optics.

Languages:
The mandatory language for this position is English, both spoken and written. Candidates should also have a commitment to learn French, which is considered beneficial for integration into the workplace.

Additional Notes:
This position is fully onsite and involves a contract duration of 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 is March 1, 202
  • The role may require work in radiation areas, interventions in underground installations, and the candidate must possess a valid driving license. Additionally, there may be stand-by duties and work during nights, Sundays, and official holidays as required by the organization. The compensation includes a monthly stipend between 6287-6911 Swiss Francs, 30 days of paid leave per year, comprehensive health insurance, family allowances, and a relocation package.
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