Applied Physicist

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

• It is located in Geneva, Switzerland, and is known for its groundbreaking work in particle physics. CERN employs thousands of scientists, engineers, and support staff from over 100 countries, making it a hub for international collaboration in scientific research. The organization operates the largest particle physics laboratory in the world and is home to the Large Hadron Collider (LHC), which has made significant contributions to our understanding of fundamental physics. CERN's mission is to push the frontiers of science and technology, fostering an environment of innovation and collaboration among diverse professionals.

Job Overview:
The position of Applied Physicist at CERN involves performing Monte Carlo radiation transport studies specifically for the FCC-ee experimental insertions. The role requires quantifying the radiation exposure of machine components and equipment installed in the FCC-ee tunnel. The successful candidate will contribute to the design and optimization of shielding solutions for both the final focus quadrupoles and the tunnel infrastructure. Additionally, the physicist will conduct radiation background studies for experiments, ensuring that the safety and efficiency of the FCC-ee operations are maintained. This position is crucial for advancing the research capabilities of CERN and requires a strong background in applied physics and radiation transport simulations.

Duties and Responsibilities:
The duties and responsibilities of the Applied Physicist include conducting particle-matter interaction studies using the FLUKA Monte Carlo code, implementing geometry models for FCC-ee machine studies, particularly focusing on the Machine-Detector Interface. The physicist will assess expected radiation levels resulting from beam losses and synchrotron radiation emission in the FCC-ee experimental insertions. They will perform background studies that will serve as input for detector design and will work closely with beam physicists responsible for particle tracking studies. Furthermore, the physicist will actively participate in the conceptual design of radiation shielding assemblies and collaborate with mechanical engineers to develop shielding concepts into technical specifications. This role demands a proactive approach to problem-solving and a commitment to teamwork in a multidisciplinary and international environment.

Required Qualifications:
Candidates must possess knowledge of particle-matter interactions and have experience with Monte Carlo radiation transport simulations. Proficiency in scientific computing is essential, and familiarity with accelerator physics is considered an advantage. The ability to work collaboratively in a multidisciplinary team is crucial, as the role involves interaction with various experts in applied physics and engineering. Candidates should also demonstrate a problem-solving mindset and a willingness to learn new tools quickly, particularly those related to particle transport simulations.

Educational Background:
The ideal candidate should have a professional background in Applied Physics or a related field. They must hold 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 important that candidates have not previously held a CERN fellow or graduate contract.

Experience:
The position requires candidates to have a solid level of experience in applied physics, particularly in areas related to radiation transport and particle interactions. Those with a Master's degree should have between 2 to 6 years of relevant professional experience, while PhD holders should have up to 3 years of experience in a related field. This experience should ideally include practical applications of Monte Carlo simulations and scientific computing.

Languages:
A good command of both spoken and written English is mandatory for this position, as it is the primary language of communication at CERN. Additionally, candidates should demonstrate a commitment to learning French, which is beneficial for integration into the local community and workplace.

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 position is fully onsite at CERN in Geneva. The target start date for this role is May 1, 202

• The job reference number is SY-STI-BMI-2026-11-GRAP. The position offers a competitive monthly stipend ranging from 6372 to 7004 Swiss Francs, which is tax-free, along with 30 days of paid leave per year plus an additional two weeks of annual closure. Employees are covered by CERN's comprehensive health insurance scheme, which includes coverage for spouses and children, and they will also be part of the CERN Pension Fund. Additional benefits include family allowances, a relocation package, and opportunities for on-the-job and formal training, including language classes.