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.
