System Administrator 80-100% (m/f/d)

Your area of responsibility * Administration of Windows, Linux and BSD systems as well as the services operated on them; including web servers (Apache, Litespeed, IIS), mail, DNS and database servers (MySQL, MSSQL) * Operation and further development of our virtualized environments with a focus on Proxmox (as well as VMware) * Management of the entire network including L2 networking, VLANs, bonding configurations as well as switches, firewalls, load balancers and routers from the manufacturers Juniper, Cisco and Arista * Administration and optimization of our storage solutions (Ceph, ZFS, NFS, SMB) with a consistent focus on high availability * Ensuring IT security as well as proactive firewall management (pfSense, OPNsense, FortiGate) * Support and implementation of changes in our Microsoft-365 environment (Exchange Online, SharePoint, Teams, OneDrive, Intune) * Automation of recurring administrative tasks using scripting (Bash, Python, PowerShell) * Proactive 2nd/3rd-level support, in-depth error analysis as well as continuous performance optimization of the entire infrastructure * Readiness to participate in on-call duty Our desired requirements * Completed degree in computer science or comparable practical experience * Sound knowledge of network technologies (Junos OS, Cisco IOS) * Very good experience in the administration of Windows and Linux servers * In-depth knowledge in the area of storage technologies (Ceph, ZFS, high-availability environments) * Experience with virtualization platforms (VMware, Proxmox) as well as hosting technologies (DNS, mail server, load balancer) * Familiarity with firewall and security solutions (pfSense, OPNsense, Fortinet FortiGate) * Completed degree in computer science or comparable practical experience * Sound knowledge of network technologies (Junos OS, Cisco IOS) * Very good experience in the administration of Windows and Linux servers * In-depth knowledge in the area of storage technologies (Ceph, ZFS, high-availability environments) * Experience with virtualization platforms (VMware, Proxmox) as well as hosting technologies (DNS, mail server, load balancer) as well as familiarity with firewall and security solutions (pfSense, OPNsense, Fortinet FortiGate) * Very good German and English skills in spoken and written form * Teamwork skills, resilience and the ability to work reliably even under pressure * Driver's license Cat. B and own vehicle are an advantage Our offer With us, a responsible and varied activity awaits you in the dynamic IT and hosting industry, in which you will receive a lot of creative freedom and personal responsibility. We offer you a modern working environment with flat hierarchies and room for your personal as well as professional development. * We offer you a modern working environment with room for personal and professional development as well as flexible working hours * Look forward to free drinks and snacks, five weeks of vacation and flexible working, including remote. Have we piqued your interest and are you ready to take on this new exciting challenge? Then we look forward to your application at [ ](< >)! Applications via recruitment companies will not be considered! j4id10449613jm j4it1043jm j4iy26jm