Expert Linux Administrator - 2nd/3rd Level (m/f/d)

Job description

Shape reliable Linux operations while solving the challenges behind them Combine hands-on 2nd Level operations with 3rd Level technical ownership . You will keep our Linux environments stable, secure and performant while solving complex issues and driving automation, optimization and continuous improvement. Your tasks Operations & support: Manage incidents, service requests and changes across RHEL-based and Debian environments, including escalations, root-cause analyses and problem management. Monitoring & performance: Monitor systems with Zabbix, resolve alerts and performance issues, and drive performance tuning and capacity planning. Deployment & automation: Deploy Linux across Azure, vSphere and Proxmox and develop automation using Terraform, Packer, Puppet, Ansible and Git. Lifecycle & patching: Manage system lifecycle, patching and upgrades, including administration and improvement of Red Hat Satellite. System administration & security: Manage Linux services, storage, networking, access and AD integration, and contribute to system hardening and certificate management. Infrastructure services: Operate and improve Linux-based services and platforms, including NFS, Samba, Apache/nginx, Postfix, Docker, Proxmox/Ceph, DNS, phpIPAM and GitLab. Backup & recovery: Manage backup and restore activities with Veeam and contribute to disaster-recovery concepts, testing and documentation. Your profile Several years of experience administering RHEL-based and Debian Linux systems in enterprise environments, including advanced troubleshooting. Strong Linux administration skills covering system services, storage, networking, file services and performance . Experience with automation and Infrastructure as Code , using tools such as Git, Puppet, Ansible, Terraform, Packer and Bash. Knowledge of Linux security and integration , ideally including AD integration, SELinux, SSH and PKI/certificates. Structured analytical and problem-solving skills , combined with experience in ITIL-based support processes and Linux lifecycle management. Experience with technologies such as Azure, vSphere, Proxmox/Ceph, Zabbix, Veeam or Red Hat Satellite is an advantage; Linux certifications are welcome. A hands-on, collaborative mindset , reliable documentation habits and very good English skills; People of all genders are always meant equally; for linguistic simplification and better readability, only the masculine form is used in the text. LEONI processes your application data in an IT-system that is consistent across the company and uses Foreign Service providers. By sending your application, you agree to this procedure. LEONI ensures the compliance with data protection. LEONI Wiring Systems RO S.R.L. LEONI is a global provider of products, solutions, and services for power distribution and connectivity in the automotive industry. The Group employs approximately 95,000 people across 23 countries and generated consolidated sales of approximately EUR 3.9 billion in 2025, excluding the former Automotive Cable Solutions division With a 74.9% ownership stake in LEONI, LUXSHARE is both the company’s majority shareholder and a strategic partner, actively supporting and enabling LEONI’s long-term growth and success while contributing to its strategic direction. LEONI’s customer base spans leading global automotive OEMs, commercial vehicle manufacturers, and component suppliers. Join us and help drive the transformation of the automotive world.