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.