Network Administrator (m/f/d)

Job description

We are looking for a hands-on Senior Network Administrator to design, implement, and operate our enterprise network across multiple international sites. The ideal candidate brings deep expertise in next‑gen firewalls (Fortinet & Cisco Firepower), enterprise switching (Cisco & Juniper), and network automation. You will define network architectures, harden security, streamline operations via scripting, and support site installations with regular travel within Germany. Key Responsibilities: Architecture & Design: - Define scalable, secure LAN/WAN/SD-WAN architectures and standards for global sites - Produce high-quality HLD/LLD documentation, network diagrams, IP schemas, and security policies - Evaluate and select technologies aligned with performance, security, and cost goals. Build & Implementation: - Install, configure, and optimize firewalls: Fortinet FortiGate and Cisco Firepower (including FMC, policy objects, IPS/IDS, SSL inspection, HA clustering, SD-WAN) - Configure enterprise switches: Cisco Catalyst/Nexus and Juniper EX/QFX (VLANs, STP, LAG/MLAG, VRRP/HSRP, QoS, port-security, 802.1X) - Implement site rollouts, migrations, and cutovers with minimal downtime - Maintain and...