Applied Physicist

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 and is known for its groundbreaking work in particle physics. The organization is dedicated to pushing the frontiers of science and technology, fostering an environment of innovation and collaboration among a diverse range of professionals, including physicists, engineers, and administrative staff. Diversity is a core value at CERN, and it remains central to its mission and continued success.

Job Overview:
The position of Applied Physicist at CERN involves working on the LEP data@EDM4HEP project, which focuses on migrating data collected from the LEP experiments in the 1990s to a new common format suitable for the Future Circular Collider (FCC). The successful candidate will be responsible for consolidating the extraction chain of ALEPH data into EDM4hep, ensuring the correct data structures are utilized, and optimizing applications for performance and usability. This role requires validating the extraction chain with benchmark analyses and applying it to the entire ALEPH data sample, including Monte Carlo simulated data. The physicist will also work on producing new Monte Carlo events using legacy ALEPH software and investigate similar applications for DELPHI and OPAL data. The position demands collaboration with various teams, including the Key4HEP team and international partners from Brown University and MIT, and may involve supervising students on specific tasks related to the project.

Duties and Responsibilities:
The duties and responsibilities of the Applied Physicist include:

• Consolidating the extraction chain of ALEPH data into EDM4hep, ensuring the appropriate data structures are used and proposing modifications as necessary.
• Validating the extraction chain with a significant set of benchmark analyses and applying it to the entire ALEPH data sample, including Monte Carlo simulated data.
• Documenting the processes and providing help tools for users.
• Consolidating workflows to produce new Monte Carlo events using legacy ALEPH software.
• Investigating the application of similar methodologies to DELPHI and OPAL data, requiring collaboration with relevant personnel.
• Supporting users of the migrated data and utilizing their feedback to enhance the data set and tools.
• Presenting results at relevant events and possibly supervising students on specific project-related tasks.

Required Qualifications:
Candidates must be nationals of CERN Member or Associate Member States and possess a professional background in Computer Science, Physics, 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. Additionally, candidates must not have previously held a CERN fellow or graduate contract.

Educational Background:
The educational background required for this position includes a Master's degree or PhD in Computer Science, Physics, or a closely related field. A strong foundation in particle physics and data analysis is essential, along with familiarity with HEP data sets and event data models.

Experience:
The ideal candidate should have 2 to 6 years of post-graduation professional experience if holding a Master's degree, or up to 3 years of experience if holding a PhD. Experience in building data analysis libraries and working on large open-source codebases is highly desirable, as is familiarity with tools used in HEP analysis or data storage.

Languages:
Proficiency in spoken and written English is mandatory, and candidates should be committed to learning French. Familiarity with additional languages may be considered a plus, particularly in a collaborative international environment.

Additional Notes:
This position is fully onsite and requires a commitment of 40 hours per week. The contract duration is 24 months, with the possibility of extension up to a maximum of 36 months. The job may involve working during nights, Sundays, and official holidays as required by the organization's needs. The position offers a monthly stipend between 6372-7004 Swiss Francs (tax-free), 30 days of paid leave per year, comprehensive health insurance coverage, and a relocation package depending on individual circumstances. On-the-job training and formal training, including language classes, are also provided.