Applied Physicist for ATLAS Trigger Reconstruction - European Organization for Nuclear Research (Geneva)

About this position

The summary below is published by European Organization for Nuclear Research on the official vacancy notice. Our own analysis — salary realism, comparable openings, career trajectory, language profile — follows further down the page.

Key responsibilities

According to the vacancy notice, the role centres on the following duties:

• Design new triggering algorithms and strategies, including alternative data flows and ML/AI-based approaches
• Develop tools to support HL-LHC trigger menu studies
• Simulate trigger selections and estimate trigger rates using data and HL-LHC Monte Carlo samples
• Ensure that proposed solutions meet trigger menu constraints on processing resources and rate limits
• Implement solutions within the central ATLAS trigger software
• Collaborate closely with ATLAS trigger and TDAQ upgrade experts
• Team supervision responsibilities

Are you eligible?

Check these requirements from the notice before investing time in an application:

• Education: PhD in Physics or a related field, or Master's degree
• Experience: Master's degree with 2 to 6 years of post-graduation professional experience, or PhD with no more than 3 years of post-graduation professional experience
• Languages: English (spoken…), French (willing…)
• Key skills: Strong background in collider physics, Experience with AI/ML and trigger systems, Strong software skills, Excellent communication and presentation skills, Experience with, or willingness to supervise, students
• Eligibility: You have never had a CERN fellow or graduate contract before

Contract and working arrangements

Contract duration: 24 months, with a possible extension up to 36 months maximum.

Working arrangements: Fully Onsite.

Hiring unit: ATLAS, Experimental Physics.

Position details

Reference

EP-ATL-OSW-2026-124-GRAP

Last Verified

22 July 2026

Position overview

This is the official EU Careers listing for Applied Physicist for ATLAS Trigger Reconstruction at CERN based in Geneva (Other). The vacancy reference is EP-ATL-OSW-2026-124-GRAP. The role falls under the Research domain.

The goal of this project is to introduce innovative selections into the ATLAS trigger system to improve the identification of events in difficult regions of the parameter space, including rare Standard Model processes and exotic signatures. In collaboration with NextGen doctoral students, the selected candidate will contribute to the development of the trigger menu for the High-Luminosity Large Hadron Collider (HL-LHC) era. The position is part of the [Next Generation Trigger](https://cern.ch/nextgen-proposal) programme.

Your responsibilities

* Design new triggering algorithms and strategies, including alternative data flows and ML/AI-based approaches. * Develop tools to support HL-LHC trigger menu studies. * Simulate trigger selections and estimate trigger rates using data and HL-LHC Monte Carlo samples. * Ensure that proposed solutions meet trigger menu constraints on processing resources and rate limits. * Implement solutions within the central ATLAS trigger software. * Collaborate closely with ATLAS trigger and TDAQ upgrade experts. * This role includes team supervision responsibilities.

Your profile

* Strong background in collider physics. * Experience with AI/ML and trigger systems.

Skills

* Strong software skills * Excellent communication and presentation skills. * Experience with, or willingness to supervise, students. * Spoken and written English, with a commitment to learn French.

Eligibility criteria:

* You have a professional background in PhD in Physics or a related field,and 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.

* You have never had a CERN fellow or graduate contract before.

Job closing date: 22.07.2026 at 23:59 CEST.

Contract duration: 24 months, with a possible extension up to 36 months maximum.

Working hours: 40 hours per week

Job flexibility: Fully Onsite

Target start date: 01-October-2026

This position involves:

* Work during nights, Sundays and official holidays, when required by the needs of the Organization.

Job reference: EP-ATL-OSW-2026-124-GRAP

Field of work: Experimental Physics

Benchmark job: 200140 - Applied Physicist

Global Benefits

* A monthly stipend between 6372-7004 Swiss Francs per month (tax free) depending on your degree. * 30 days of paid leave per year plus 2 weeks annual closure. * Coverage by CERN’s comprehensive health insurance scheme (for yourself, your spouse and children), and membership of the CERN Pension Fund. * Family, child and infant monthly allowances depending on your individual circumstances. * A relocation package (installation grant and travel expenses) depending on your individual circumstances. * Possibility to extend your contract up to 36 months. * On-the-job and formal training including language classes.

Overview of CERN -Discover a world where the impossible is made possible!

At CERN, the European Organization for Nuclear Research, we are pushing the frontiers of science and technology. Our groundbreaking work brings together not only physicists but also a diverse range of professionals from engineering, technical, scientific, and administrative fields. Together, we foster an environment where innovation and collaboration thrive.

Every day, we face exciting new challenges and opportunities to contribute to cutting-edge research that shapes our understanding of the universe. We meet these challenges through the diverse perspectives within our teams, ensuring every contribution is valued and driving our shared sense of inclusion and purpose. Diversity is a core value of CERN since its foundation, and it remains central to our mission and continued success.

If you are ready to be part of a dynamic, inclusive community pushing the boundaries of knowledge, CERN is the place where your curiosity and skills can thrive. Be part of our mission to uncover what lies at the heart of the universe!TAKE PART!

More information about us, here:[careers.cern](https://careers.cern/)

Application timeline

This vacancy was first listed on 7 July 2026, 15 days ago.

No closing date is published in the source feed for this position. EU vacancies typically remain open for four to eight weeks; check the official vacancy notice for the cut-off date and time.

Last verified against the EU Careers feed on 22 July 2026.

Where to learn more

For headcount, mission, and other open vacancies at CERN see the CERN institution page; for the cost of living, correction coefficient, and other postings in Geneva see our Geneva location page; for related vacancies in the Research field browse our Research domain page.

New to EU careers? Our beginner's guide walks through entry routes, EPSO competitions, and what to prepare. For application logistics see application tips and EPSO competitions.