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.
