CTG IT Solutions – Linux System Administrator

Description de la mission

CTG IT Solutions – Linux System Administrator
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.
Description société
CTG is an international IT solutions and services company, back over 50 years of experience.

CTG IT Solutions, part of the CTG Group is dedicated specifically to the European Institutions. More than 200 colleagues are working within multicultural teams in Brussels, Luxembourg, and Strasbourg.
We provide to the European Institutions all kind of IT services, such as IT Service Management (ITSM) like Service Desk and Helpdesk or infrastructure services, but also Application Solutions (Analysis, Development, Maintenance & Project Management) and Test Management. No fewer than 27 nationalities share their expertise and learn from each other.

Our goal? Keep on growing, in a serene and pragmatic way, preserving our philosophy of proximity and cooperation. Certified “Best Workplace in 2021”, we advocate multiculturalism, regular monitoring and open communication.

Our projects with European Institutions are unique. You are an IT professional looking for a challenging position in an international and multi-cultural environment ? Join CTG ! As your career evolves, you will receive steady support from a well-established and growing company, that is seeking your talent !
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