Jobs at CERN

Design and implement new ATLAS trigger algorithms and ML-based strategies for HL-LHC. Simulate trigger selections with HL-LHC Monte Carlo, estimate rates, ensure resource/rate constraints, develop supporting tools, implement in central ATLAS trigger software, collaborate with TDAQ experts, and supervise students.

Conduct research on ML and AI approaches for track reconstruction in high-pileup environments; investigate, benchmark, and integrate ML-based tracking algorithms into the EF/ACTS workflow; evaluate physics and computational performance; supervise team members and guide deployment toward CPU/GPU heterogeneous EF architectures.

Design and develop new L0 muon trigger algorithms (software and firmware) to improve robustness and sensitivity to challenging signatures using simulations and AI/ML; collaborate with ATLAS trigger and TDAQ teams; supervise students.

Develop, optimise and deploy ML algorithms on FPGA/SoC firmware for the ATLAS Global Hardware Trigger. Maintain ML-to-firmware pipelines, support global integration at CERN, explore anomaly detection and trigger-level analysis, evaluate novel industry technologies, and supervise team activities for HL-LHC deployment.

Provide administrative and communication support for HR processes, advise students and graduates, deliver HR presentations, and process contractual actions while maintaining confidentiality and high-quality service.

Develop, test and validate data-acquisition hardware and software for ATLAS forward detectors. Maintain DAQ software, design online monitoring tools, perform laboratory testing of electronics and full readout chains, and support detector operation including on-call activities.

Lead development, validation and optimisation of Geant4-based detector and physics simulations (including GPU/AdePT). Integrate GPU implementations into experiment frameworks, run regression tests against CPU references, coordinate with LHC experiments, supervise contributors, organise project activities, and engage the worldwide Geant4 community.

The Python Software Engineer will develop APIs and desktop applications for CERN's control systems, focusing on robustness and user experience. Responsibilities include collaborating with teams, mentoring junior engineers, and contributing to open-source projects.

Assemble and test CASSIA silicon sensor prototypes, perform laboratory/beam measurements and irradiations, characterise and simulate on-chip amplifiers and FE circuits, improve designs for time resolution and radiation hardness, develop integration concepts for readout matrices, and collaborate across multidisciplinary teams.

Assemble, test and characterise silicon pixel detector modules for the ATLAS ITk pixel detector. Support and optimise production processes, automate lab procedures, develop analysis and database tools, record and evaluate measurements, upgrade lab equipment, and integrate modules into larger subsystems while collaborating with engineers, physicists and technicians in an international research environment.

Develop, migrate, and maintain modern C++ control software on Linux for power converter systems. Own and modernize components from FGCDv1/FESA to FGCDv2, improve the framework, ensure code quality and CI/CD, collaborate with multidisciplinary teams, and supervise team members. Support architecture, testing, and operational readiness.

Develop, maintain and support CERN cryogenics process control systems. Design, implement, test and commission control software and hardware; participate in installation, configuration data management, system integration, and collaborate with operations and service providers to resolve issues and improve control logic and CI/CD processes.

Contribute to developing the next-generation CERN Document Server using Python backends and React frontends. Implement features, migrate content, write and test code, collaborate with users and engineers, document solutions, and learn best practices in version control, containers, and agile teamwork.

Design, develop, commission and maintain industrial control systems for cooling and ventilation plants. Gather requirements, program PLCs, configure SCADA, test on simulators, perform on-site commissioning, and implement operational improvements and corrective actions.

Lead applied physicist responsible for commissioning, operating and optimising the Linac3 ion source; coordinate maintenance, supervise a multidisciplinary team, perform beam measurements and simulations, contribute to upgrade design and injector commissioning, and participate in 24/7 expert on-call rotation.

Develop and optimise Geant4 and ROOT components for modern HPC systems with GPU acceleration. Design performance strategies, refactor hot loops and memory layouts, implement kernels, profile and remove bottlenecks, support exabyte-scale processing, develop profiling/testing tools, coordinate projects, supervise team members, and engage with user communities and external partners.

Operate, maintain and upgrade gas systems for LHC experiments; provide 24/7 stand-by support; run R&D to find eco-friendly gas replacements; validate gas compatibility in test setups; supervise team activities and perform technical interventions in laboratories and underground experimental areas.

Contribute to theoretical research in particle physics, collaborate with experimental physicists, participate in committees, and promote scientific culture at CERN.

As a Technical Student in Applied Physics, you'll assist engineers and scientists on projects involving instrumentation and data acquisition, fostering hands-on experience under supervision.

CERN offers a short term internship for undergraduate students in technical or administrative fields, providing hands-on experience in a scientific environment.