Network Administrator
Posted 18 Nov 2025
Advertised as “Network Administrator (m/f/d)”
BranchFactor Summary
The original posting with the fluff stripped out
- Expected experience
- 5–8 yrs
- Management level
- People management
No salary listed for this role.
CertificationsNSE 4, CCNP Enterprise, CCNP Security, JNCIS-ENT, JNCIP-ENT, Security+, CISSP
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.
Responsibilities
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 configure SASE platform
Operation & Security
- Own Level 3 incident/problem management; perform advanced troubleshooting (packet captures, flow analysis, logs)
- Maintain firewall and switch gold configs, rule hygiene, and change control (ITIL)
- Ensure compliance with security baselines, segmentation, and zero-trust principles
- Monitor capacity/performance and proactively remediate risks
Automation & Scripting
- Build and maintain automation for configuration, compliance checks, and deployments using Python and/or Ansible (e.g., templates, linting, CI/CD pipelines)
- Develop scripts for backup/restore, inventory, API-based object management (Fortinet/Cisco/Juniper)
Collaboration & Governance
- Work cross-functionally with Workplace, Cloud, Security, and Site Operations teams
- Support audits and contribute to policy development and continuous improvement
- Mentor junior engineers; act as technical escalation point
Travel
- Travel to German sites for installations, surveys, and hands-on support (approx. 10–25%, as needed)