Network Administrator (Third-Level Support)

Quick Facts

Role: Network Administrator for Third-Level Support (m/w/d). Work model: 100% on-site in Köln. Duration: long-term. Environment: security-critical and regulated.

Description

Provide third-level support for a security-critical network and security infrastructure by analyzing and resolving complex network and security incidents. Administer Cisco networking infrastructure and operate/configure Palo Alto firewalls, including root-cause analyses and sustainable solutions. Ensure availability, performance, and network security while implementing configuration changes, updates, and patches.

Responsibilities

• Analyze and remediate complex network and security incidents.
• Administer and further develop Cisco network infrastructure.
• Operate and configure Palo Alto firewalls.
• Perform root-cause analyses and develop lasting solutions.
• Ensure availability, performance, and network security.
• Implement configuration changes, updates, and patches.
• Support first- and second-level support teams during escalations.
• Create and maintain technical documentation and runbooks.
• Participate in on-site assignments and planned on-call duty.

Requirements

• Completed IT training, a degree in IT, or comparable qualification.
• Several years of practical experience in third-level network support.
• Strong knowledge of Cisco networking technologies.
• Experience with Palo Alto firewalls.
• Very good knowledge of routing, switching, VLAN, TCP/IP, DNS, and DHCP.
• Experience with firewall rule sets, VPN, network segmentation, and security technologies.
• Ability to independently analyze and resolve complex network incidents.
• Experience with network monitoring and performance optimization.
• Experience with ITIL-based operational and support processes.
• Very good German skills and good English skills.
• SÜ2 security clearance: already available or willingness to obtain it.

Benefits

• Long-term role in a security-critical, regulated environment.
• Ownership of complex incident analysis, root-cause resolution, and documentation.
• On-site work in Köln with participation in on-call duty and site assignments.