Applied Physicist

Applied Physicist

European Organization for Nuclear Research (CERN)

November 28, 2025January 12, 2026PecSwitzerland
European Organization for Nuclear Research (CERN) About
At CERN, the European Organization for Nuclear Research, physicists and engineers are probing the fundamental structure of the universe. They use the world's largest and most complex scientific instruments to study the basic constituents of matter – the fundamental particles.
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 a mission to probe the fundamental structure of the universe, CERN employs thousands of scientists, engineers, and support staff from over 100 countries. The organization operates in multiple countries and is known for its groundbreaking work in particle physics, utilizing the world's largest and most complex scientific instruments to study the basic constituents of matter. CERN's commitment to diversity and inclusion is a core value, ensuring a collaborative environment that fosters innovation and discovery.

Job Overview:
The position of Applied Physicist at CERN involves contributing to the operation and development of the CLEAR user facility, with a strong emphasis on optimizing beam parameters to meet the experimental needs of various research projects. The role requires close coordination with user groups and support for experiments, particularly in the field of medical research, focusing on advanced techniques such as Very High Energy Electrons (VHEE) and FLASH radiotherapy. The successful candidate will be responsible for coordinating beam-time activities, enhancing operational tools and procedures, and participating in consolidation and upgrade projects. Additionally, mentoring students and leading training activities at CLEAR and partner institutions like JUAS and ATSOA are key components of this role, making it essential for the candidate to possess strong leadership and communication skills.

Duties and Responsibilities:
The duties and responsibilities of the Applied Physicist include operating a linear electron accelerator, providing support and communication to user groups, and conducting beam experiments aimed at developing novel cancer radiotherapy techniques. The role also involves collaborating on the development and enhancement of software tools for accelerator operation, training and supervising undergraduate and graduate students, and overseeing team activities. The candidate will be expected to analyze and optimize accelerator performance, support the operation of experimental facilities, and integrate various experiments while applying knowledge of accelerator physics theory and medical physics.

Required Qualifications:
Candidates must be nationals of a CERN Member or Associate Member State and possess a professional background in Applied Physics or Engineering (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. It is also required that candidates have not previously held a CERN fellow or graduate contract. Knowledge of accelerator physics and familiarity with software development and programming are essential, while experience in medical applications of particle beams is considered a plus.

Educational Background:
The educational background required for this position includes a Master's degree or PhD in Applied Physics, Engineering, or a closely related field. The candidate's academic qualifications should be complemented by relevant professional experience in the field, particularly in areas related to particle accelerator operation and medical physics applications.

Experience:
The position requires candidates to have experience in particle accelerator operation, particularly with electron beams. A solid understanding of accelerator physics is necessary, along with familiarity in software development and programming. Experience in medical applications of particle beams is advantageous but not mandatory. The ideal candidate should demonstrate a proven track record in analyzing and optimizing accelerator performance and supporting experimental facilities.

Languages:
Proficiency in spoken and written English or French is mandatory, with a commitment to learn the other language being highly desirable. This bilingual capability is essential for effective communication within the diverse environment at CERN.

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 job offers a hybrid working model. The target start date for this position is March 1, 202
  • It is important to note that this role involves working in radiation areas and exposure to ionizing radiation, classified as category A. Therefore, the selected candidate must obtain medical clearance before a contract offer is confirmed. The compensation includes a monthly stipend ranging from 6287 to 6911 Swiss Francs (net of tax), coverage by CERN's comprehensive health scheme for the employee and their family, and various allowances depending on individual circumstances. Additionally, the position offers 30 days of paid leave per year, along with opportunities for on-the-job and formal training at CERN, as well as in-house language courses.
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