> Markdown version of [/jobs/ext/1166583-computer-network-defense-administrator-firewall-clearance-required](https://www.wearedevelopers.com/jobs/ext/1166583-computer-network-defense-administrator-firewall-clearance-required). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Computer Network Defense Administrator (Firewall) - Clearance Required - **Company:** Ironclad Technology Services - **Location:** Wiesbaden, Germany - **Salary:** €90,000.0 - €110,000.0 - **Contract:** Permanent contract - **Skills:** Access Control List, User Authentication, Cisco PIX, Cisco Systems VPN Client, Cloud Computing, Configuration Management, Cyber Security, Computer Networks, Linux, Ethernet, Monitoring of Systems, Identity and Access Management, Networking Hardware, Intrusion Detection and Prevention, Intrusion Detection Systems, Virtual Private Networks (VPN), Network Security, Network Architecture, Network Monitoring, Red Hat Enterprise Linux, Software Deployment, TCP/IP, Wide Area Networks, Network Routers, Identity Services Engine, Load Balancing, Computer Network Operations, Firewalls (Computer Science), SC Clearance, Information Technology, Firepower, Big Ip, Cisco, Vmware - **Published:** July 3, 2026 - **Apply:** https://de.indeed.com/viewjob?jk=e3a4fd2dcb0142fb ## About the Role * Minimum two (2) years of experience using and maintaining networks (TCP/IP, Ethernet, or VMWare). * Minimum two (2) years managing F5 Big-IP with ASM, Cisco FTD/ASA firewalls or ISE servers. * At least one (1) year of hands-on experience with ACLs and router security configurations. * Two (2) years of direct experience with U.S. military C2 or commercial LAN/WAN systems. * Vendor certification (e.g., Network Firewall, IDS, F5-CA, F5-CTS, F5-CSE, BCCPA, CCNP Security, CCIE Security, Cisco CyberOps Professional) * DoD 8140/8570.01-M IAT Level III certification (CISSP, SecurityX, CCNA, CCNP Security, CCSP, GCED, GCIA, GCLD, GDSA, GFACT). * Strong understanding of network security architecture. * Ability to work both independently and as part of a team. Bonus points if you have: * Red Hat experience. Security Clearance: * Active Secret Clearance with SSBI required. Education: * Bachelor's degree in Engineering, Computer Science, Science, Business Administration, or Mathematics; OR * Minimum of eleven (11) years of specialized IT experience in lieu of a degree. ## Description Provide technical assistance to maintain and enhance firewalls, load balancers, VPN concentrators, device authentication servers, and router security configurations for all networks in the 5th Signal Command AOR. Provide technical assistance to the USAREUR network perimeter/data center security, configuration management systems, and monitoring software currently in use. Focus on the installation, administration, and operational support of JRSS Top Level Architecture and Data Center security components. These components consist of Cisco Adaptive Security Appliance (ASA) firewalls, Cisco Firepower Threat Defense (FTD) firewalls, Cisco Identity Services Engine (ISE) servers and f5 BIG-IP load balancers. Desired experience will be in managing Cisco security/authentication devices and f5 Network devices. In addition, provide support for any VPN servers that support the Army Border Security architecture., * Design, install, configure, and maintain firewalls, load balancers, and authentication servers. * Administer and support JRSS Top Level Architecture (TLA) security components, including Cisco ASA firewalls and VPNs. * Manage and maintain Cloud-Based Internet Isolation (CBII) Menlo service for EUR tenants. * Provide support to existing monitoring software and configuration management systems. * Perform detailed analysis and provide technical recommendations for enhancing network security posture. * Collaborate with US military command and control systems and LAN/WAN environments to ensure secure and effective communications infrastructure., Tags: Network Security Engineer, Network Security Administrator, Cybersecurity Engineer, Information Assurance, Information Security, Network Engineer, Infrastructure Engineer, Firewall Engineer, Firewall Administrator, Cisco ASA, Cisco Firepower, Cisco FTD, Cisco Identity Services Engine, Cisco ISE, Cisco Security, Cisco VPN, VPN Administrator, VPN Concentrator, F5 BIG-IP, F5 ASM, F5 Load Balancer, Load Balancing, Application Delivery Controller, ADC, Network Authentication, Device Authentication, Identity and Access Management, ISE Administration, JRSS, Joint Regional Security Stack, Top Level Architecture, TLA, Cloud-Based Internet Isolation, CBII, Menlo Security, Network Perimeter Security, Perimeter Defense, Network Infrastructure, LAN, WAN, TCP/IP, Ethernet, VMware, Router Security, Access Control Lists, ACLs, Configuration Management, Network Monitoring, Security Architecture, Network Hardening, Secure Communications, Network Operations, Network Defense, Defense in Depth, Intrusion Detection, IDS, Threat Prevention, Enterprise Networking, Data Center Security, C2 Systems, Command and Control, USAREUR, 5th Signal Command, U.S. Army, Army Network, Department of War, DoW, Department of Defense, DoD, Federal Government, Government Contractor, GovCon, National Security, Secret Clearance, SSBI, Cleared Jobs, IAT Level III, DoD 8140, DoD 8570, CISSP, CCNP Security, CCIE Security, Cisco CyberOps Professional, CCSP, GCED, GCIA, GCLD, GDSA, GFACT, F5-CA, F5-CTS, F5-CSE, Red Hat, Linux, Onsite, Europe, OCONUS, Enterprise Security, Network Operations Center, NOC, Security Operations, SOC ## Related Videos - [How Cisco embraced a DevOps culture within its network engineering team](https://www.wearedevelopers.com/videos/99-how-cisco-embraced-a-devops-culture-within-its-network-engineering-team) - [What makes Cybersecurity different for critical infrastructure?](https://www.wearedevelopers.com/videos/571-what-makes-cybersecurity-different-for-critical-infrastructure) - [WebAssembly: The Next Frontier of Cloud Computing](https://www.wearedevelopers.com/videos/972-webassembly-the-next-frontier-of-cloud-computing) - [Docker network without Docker](https://www.wearedevelopers.com/videos/1418-docker-network-without-docker) - [Generating code with Angular schematics](https://www.wearedevelopers.com/videos/129-generating-code-with-angular-schematics) - [Docker exec without Docker](https://www.wearedevelopers.com/videos/1094-docker-exec-without-docker) ## Related Articles - [Best Coding Boot Camps in Germany](https://www.wearedevelopers.com/magazine/237-best-coding-boot-camps-in-germany) - [IT Salaries in Germany](https://www.wearedevelopers.com/magazine/287-it-salaries-in-germany) - [Dev Digest 134 - Where pixels sing?](https://www.wearedevelopers.com/magazine/477-dev-digest-134-where-pixels-sing) - [9 Ways to Make Money Hacking](https://www.wearedevelopers.com/magazine/333-9-ways-to-make-money-hacking) - [System change: restart as developer?](https://www.wearedevelopers.com/magazine/39-system-change-restart-as-developer) - [Is Software Engineering Over-Saturated?](https://www.wearedevelopers.com/magazine/418-is-software-engineering-over-saturated)