Applied Physicist

Applied Physicist

European Organization for Nuclear Research (CERN)

December 18, 2025February 1, 2026GenevaSwitzerland
Job Description
Job Posting Organization:
CERN, the European Organisation for Nuclear Research, is a leading scientific research organization established to probe the fundamental structure of the universe. It employs physicists and engineers who utilize the world's largest and most complex scientific instruments to study the basic constituents of matter. CERN's mission is to advance knowledge in the field of particle physics and to foster international collaboration in scientific research. The organization operates in multiple countries and employs a diverse workforce, emphasizing the importance of diversity in achieving its goals. CERN is known for its innovative research and development in particle physics, and it plays a crucial role in shaping our understanding of the universe.

Job Overview:
The position of Applied Physicist at CERN involves engaging in the design and specification of beam transfer systems across the accelerator complex. The role requires following the systems from initial concept through to beam commissioning and operational deployment. A significant aspect of the job includes conducting research and development (R&D) to understand the performance of existing beam transfer systems and proposing necessary improvements or upgrades to meet CERN's ambitious research program. The physicist will collaborate with both internal and external partners to draft technical and functional requirements, develop and perform beam dynamics simulations, and conduct machine development studies to validate new concepts. The position also entails commissioning beam transfer systems with particle beams, diagnosing operational issues, and communicating results through publications and presentations tailored to various audiences. Additionally, the physicist will supervise students and coordinate postdoctoral research contributions to beam transfer studies and R&D activities.

Duties and Responsibilities:
The duties and responsibilities of the Applied Physicist include: designing and specifying beam transfer systems such as injection, extraction, and primary beamlines in collaboration with partners; developing and performing simulations of beam dynamics, including advanced machine learning and AI-based models; conducting R&D to enhance system performance and reliability; planning and coordinating machine development studies; commissioning beam transfer systems with particle beams; diagnosing operational issues and proposing solutions; communicating results through peer-reviewed publications and presentations; supervising students and coordinating postdoctoral research contributions; and ensuring that all work aligns with CERN's research objectives and operational needs.

Required Qualifications:
Candidates must possess a Master's degree or PhD in Physics, Applied Physics, or a related field, or equivalent relevant experience. They should have a strong background in accelerator physics, including beam dynamics and modeling with simulation tools. Practical experience at accelerator facilities, particularly in machine development studies, beam commissioning, and operational support, is essential. The ability to analyze complex technical problems, evaluate system performance, and develop data-driven solutions is required. Candidates should also demonstrate expertise in developing robust software for simulation, data analysis, and automation, particularly with applications of machine learning, AI, and advanced optimization techniques.

Educational Background:
The educational background required for this position includes a Master's degree or PhD in Physics, Applied Physics, or a closely related field. Candidates should have a solid understanding of accelerator physics theory and practical experience in the field, particularly in areas related to beam transfer systems and performance optimization.

Experience:
The position requires significant experience in accelerator physics, particularly in beam dynamics and modeling. Candidates should have practical experience at accelerator facilities, including involvement in machine development studies, beam commissioning, and operational support. A proven track record of analyzing complex technical problems and developing effective solutions is essential, as is experience in software development for simulation and data analysis.

Languages:
Fluency in spoken and written English is mandatory, and candidates should demonstrate a commitment to learning French as part of their professional development.

Additional Notes:
This position is a limited duration contract for 5 years, with the possibility of extension up to 8 years and eligibility for an indefinite contract tenure. The job requires a valid driving license and may involve working during nights, Sundays, and official holidays as needed. Candidates must obtain medical clearance due to occupational health risks associated with the position. The job grade is 6-7, and the working hours are 40 hours per week. CERN offers a competitive salary that is tax-free, along with 30 days of paid leave per year, comprehensive health insurance, family allowances, and a relocation package depending on individual circumstances.
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