Linux System Administrator

il y a 1 jour

Bertrange, Luxembourg CTG IT Solutions Temps plein

CTG IT Solutions is currently looking for a Linux System Administrator within the European Institutions in Luxembourg.

Your RESPONSABILITIES:

Operational Support & Troubleshooting

  • Provide Level 2–3 support for Linux OS configuration, file systems, processes, log analysis, and system troubleshooting.
  • Diagnose and resolve issues related to hosted applications, platforms, reverse proxies, and server environments (Intranet/Internet).
  • Ensure proper execution of backup, storage, and security-related operational tasks.

System Administration & Infrastructure Management

  • Manage provisioning of Linux servers and VMs.
  • Maintain a reliable, standardized, and compliant operating environment.
  • Perform patch management, OS lifecycle operations, and migration activities.
  • Administer and support the OpenShift container platform.
  • Use GitLab for version control and CI/CD pipeline integration.
  • Participate in high availability (HA) and disaster recovery (DR) design and implementation.
  • Administer and support Red Hat Satellite and manage Satellite-based environments.
  • Administer and support Reverse Proxy platforms for on-premises and Cloud (AWS).

Automation scripting

  • Develop and maintain automation using Red Hat Ansible Platform to improve reliability, repeatability, and operational efficiency.
  • Contribute to service design with a focus on automation and "shift-left" practices.

Documentation & Process

  • Maintain accurate and up-to-date technical documentation and operational procedures.
  • Ensure compliance with ITIL processes (incident, change, problem management).
  • Perform activity reporting and manage operational priorities.
  • Organize knowledge-sharing workshops within the team.
  • ServiceNow for ticketing and workflow management.

Linux Platforms & Services

  • Proxies (Squid), reverse proxies (Nginx), and nftables firewalls configuration.
  • Manage SSL/TLS certificates and Linux security configurations.
  • Java- and Spring Boot–based webservers and Artemis MQ.
  • Handle client/agent support such as metricbeat, filebeats, and NetBackup.

Datacenters infrastructure and Cloud

  • Support authentication systems including SAML/OIDC, ADFS, and Azure Entra ID.
  • Networking IPv4, Virtualization (Nutanix), databases (Oracle, PostgreSQL), and storage (SAN, NAS, S3).
  • Containerisation: Kubernetes, Docker, and Podman.
Your Profile:

Education & Certifications

  • Minimum 8 years of proven hands-on experience managing Unix/Linux systems, ideally within a large-scale or critical production environment.
  • Bachelor's degree in Computer Science, Information Technology, or equivalent experience.
  • Relevant certifications (RHCSA, RHCE, Kubernetes, Ansible, ITIL, etc.) are a plus.
  • Very good knowledge of English and French.

Key Competencies

  • Strong expertise with Red Hat Enterprise Linux (RHEL) 8/9.
  • Experience with Java/Nginx application servers.

Additional knowledge:

  • Nutanix virtualization.
  • Oracle, PostgreSQL.
  • Kubernetes / OpenShift / Docker / Podman.
  • Nginx reverse proxy.
  • GitLab and CI/CD pipelines.
  • PAM/SAM solutions.
  • Backup & storage solutions (SAN, NAS, S3).
  • Advanced network knowledge (IPv4, DNS, Firewall, Routing, DMZ).
  • Java/Springboot hosting architectures.
  • Messaging systems such as Artemis MQ.
Our Offer:
  • An attractive salary package with or without a company car
  • 5 additional vacation days each year
  • A dedicated training program with personal development plans
  • Extra-legal advantages (IT material, banks, ...)
  • Regular events with the CTG team : learning lunchs, team buildings, fun events, Xmas, Marathons, ...

If you like multicultural teams and want to join a company with open communication, then apply right now

Please note that a criminal record will be asked for this position.

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