The Experimental Physics (EP) Department at CERN supports LHC experiments, including CMS, a general-purpose particle physics collaboration. The CMS Data Acquisition and Trigger Group (CMD) develops, operates, and maintains the data acquisition (DAQ) and control systems, as well as online computer clusters, Ethernet-based networks, and mass storage systems vital for the experiment.
Responsibilities:
Perform system administration tasks for the LINUX computers connected to the CMS experiment network (control room consoles, data centre servers, and virtual machines).
Communicate with the end-users to understand their needs and help translate these into appropriate solutions.
Investigate, diagnose, and resolve operational problems in collaboration with end-users ranging from physicist to operations teams.
Participate actively to the evolution of the CMS online computing infrastructure, including networks, on-line clusters, mass storage devices, virtual machines, and containers. In particular.
Provide a container orchestration system suited to different teams (DAQ, sub-detectors, system administration).
Provide an evolving NAS solution for the primary storage (users' home directory, project areas, etc.).
Provide the underlying high-performance servers and storage for the bare metal, virtual machines, and container orchestration system.
Produce technical documentation on all the processes and systems in place.
Take part in on-call duty to address urgent system administration issues, which might require intervention on-site.
Requirements:
You have a maximum of two years of professional experience since graduation in Computing and system administration (or a related field) and your highest educational qualification is a general secondary education diploma.
You have never had a CERN fellow or graduate contract before.
Applicants with a Bachelor's, Master's or PhD degree are not eligible.
Linux operating system and scripting languages such as Bash, Python.
Core services such as LDAP, Kerberos, DNS, DHCP, HAProxy, keepalived.
Installation, operation and maintenance of computing hardware (high end server platforms and desktops);
Container technology (Docker, Podman) and orchestrators (Kubernetes).
Diagnostic and monitoring solutions for the aforementioned aspects.
Configuration management tools such as Puppet with Foreman, or similar and a version control system such as Git.
