Linux System Administrator

CTG IT Solutions is currently looking for a Linux System Administrator within the European Institutions in Luxembourg.Your RESPONSABILITIES:Operational Support & TroubleshootingProvide 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 ManagementManage 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 scriptingDevelop 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 & ProcessMaintain 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 & ServicesProxies (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 CloudSupport 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 & CertificationsMinimum 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 CompetenciesStrong 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 car5 additional vacation days each yearA dedicated training program with personal development plansExtra-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.