Applied Physicist

Job Posting Organization:
CERN, the European Organization 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 is known for its groundbreaking work in particle physics and operates in multiple countries, fostering an environment of innovation and collaboration among a diverse workforce.

Job Overview:
The position of Applied Physicist at CERN involves playing a crucial role in the operation of LINAC3, CERN’s ion linear accelerator. The successful candidate will ensure reliable and efficient beam delivery across the injector chain, overseeing the safe operation and performance of ion beams supplied to downstream machines. This role requires close collaboration with operators, equipment experts, and machine coordinators to optimize beam quality, availability, and operational efficiency. The physicist will also contribute to the advancement of automation and operational tools, directly impacting CERN's physics research by preparing beams for various experimental programs. The Operations Group, which manages the full CERN accelerator complex, is responsible for delivering proton and heavy ion beams, making this position integral to the organization's mission.

Duties and Responsibilities:
The Applied Physicist will be responsible for coordinating the daily operation of the LINAC3 ion accelerator, ensuring safe, reliable, and timely beam delivery to downstream accelerators. Key duties include preparing and coordinating machine restarts, beam commissioning, and technical interventions. The physicist will work closely with operators and engineers to diagnose and resolve operational issues, monitor beam quality and machine performance, and analyze operational data to implement corrective actions. Additionally, the role involves maintaining and evolving standard operational tools, participating in machine development activities, and developing advanced tools for beam measurements and performance optimization. The physicist will also produce and maintain operational and safety documentation, contribute to shift coordination, and support knowledge transfer and training of junior colleagues.

Required Qualifications:
Candidates must possess a Master's Degree or PhD in Applied Physics, Control & Automation Engineering, or a related field. A solid background in accelerator or beam physics is essential, along with a good understanding of charged particle beams and accelerator components. Hands-on experience with the operation, commissioning, or performance optimization of complex scientific or industrial facilities is required. The ability to analyze operational data, identify performance limitations, and propose practical solutions is crucial. Experience in developing operational software, control systems, and data analysis tools (such as Python and Java) is also necessary. Proven coordination skills involving multiple technical teams and stakeholders, strong problem-solving abilities, and effective communication skills are important for this role.

Educational Background:
A Master's Degree or PhD in Applied Physics, Control & Automation Engineering, or a closely related field is required for this position. The educational background should provide a strong foundation in the principles of physics and engineering as they relate to accelerator technology and beam dynamics.

Experience:
Candidates should have a solid background in accelerator or beam physics, with practical experience in the operation, commissioning, or performance optimization of complex scientific or industrial facilities. Experience in analyzing operational data and developing operational software is essential, as is the ability to coordinate activities involving multiple technical teams and stakeholders. Experience in mentoring or training is considered an asset.

Languages:
Fluency in spoken and written English or French is mandatory, with a commitment to learn the other language being highly desirable. This bilingual requirement reflects CERN's diverse working environment and the need for effective communication across various teams.

Additional Notes:
This position is offered as a limited duration contract for 5 years, with the possibility of extension up to 8 years and eligibility for an indefinite contract tenure. The working hours are set at 40 hours per week, with hybrid job flexibility. The role includes participation in regular stand-by duties, which may involve nights, Sundays, and official holidays, as well as work in radiation areas and interventions in underground installations. A valid driving license is required. The job grade is classified as 6-7, and the reference for this position is BE-OP-PSB-2026-106-LD. 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.