Linux System Administrator - ViennaWe're expanding our infrastructure team and need an experienced Linux System Administrator to help maintain our production environment and support new technical initiatives.The RoleYou'll ensure our systems run reliably while implementing improvements across our infrastructure.Administer RHEL servers across physical and virtualized environmentsSupport CEPH, XEN Orchestra, and Docker deploymentsConfigure routing, DNS, DHCP, and firewall policiesManage VPN solutions including OPNsense, WireGuard, and OpenVPNMaintain Samba/NFS file services and Zimbra Mail ServerMonitor infrastructure using CheckMKImplement OS hardening and security controlsBuild automation using Ansible and PythonDocument processes and collaborate with the teamTechnical EnvironmentCore Technologies:RHEL (bare metal & VMs) • CEPH storage • XEN Orchestra • Docker • Samba/NFS • Zimbra • CheckMK • OPNsense • WireGuard • OpenVPN • AnsibleWe value adaptability - you don't need experience with every toolWhat You'll BringRequired:5+ years managing Linux servers in productionStrong networking and virtualization knowledgeExperience with security hardening techniquesExcellent troubleshooting and teamwork skillsNice to have:Ansible and Python scripting experience or automation toolsBackground in market data or financial information servicesWhy Join Us?Growth Role:Build infrastructure for emerging business opportunitiesStrong Team:Work alongside experienced professionals in a collaborative environmentDirect Impact:Keep critical services running for clients worldwideInterested? Ready to take on this challenge? Apply now or contact me directly to learn more opportunity.