Senior IT Network Administrator (m/f/d)

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At HRS we believe the right job can transform a person's life and the right person can transform a business. We're passionate about connecting our candidates with the right job for them.

The extensive experience in the human resources industry under our belt has given us valuable insights and extensive knowledge of the corporate cultures and thus enabled us to locate the best candidates for our clients.

For our client - a leading German strategy and management consultancy driving digital transformation and innovation – we are looking for an Senior Network Administrator (m/f/d) to join their growing team.

Responsibilities

• Take full technical ownership of network administration (Fortinet products: FortiGate, FortiSwitch, FortiMail)
• Operate and further develop our hybrid IT infrastructure (on-premises & cloud), including firewalls, switches, routing, SD-WAN, VPN, and WLAN
• Drive the expansion of open-source solutions such as Nextcloud, TrueNAS, LAMP/LEMP, WAZUH, and Proxmox VE
• Lead and support IT projects, including rollouts, migrations, and subprojects
• Analyze and resolve IT security incidents and continuously improve security concepts
• Provide 2nd-level support for internal users and ensure smooth IT operations
• Contribute to projects balancing M365 integration with open-source technologies

Our client offers

• Modern IT environment with opportunities to learn, grow, and develop in the IT field
• Supportive team with flat hierarchies and quick decision-making
• Engaging projects that help you expand your technical expertise
• Central Düsseldorf office with great transport links and parking

Requirements

• 5+ years of experience administering complex IT environments
• Degree in Computer Science, completed IT specialist training (system integration), or equivalent qualification
• Strong knowledge of Fortinet products, switching, routing, VLAN, and firewall administration
• Hands‑on experience with Proxmox VE, Veeam, and Linux systems (Debian/Ubuntu)
• Familiarity with monitoring and logging tools (Checkmk, FortiAnalyzer)
• Proven project management experience, ideally including M&A projects
• Fluent German (written and spoken)

Senior Level

• Mid‑Senior level

Employment type

• Full‑time

Job function

• Information Technology

Industries

• Human Resources Services

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Only short‑listed candidates will be contacted.

All applications will be treated strictly confidential.