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# Network Administrator

- **Company:** Zachary Piper
- **Location:** Newington, VA, United States
- **Experience:** Experienced
- **Salary:** $120,000.0 - $135,000.0
- **Contract:** Permanent contract
- **Skills:** IEEE 802.1X, Cisco Routers, CompTIA Security+, System Configuration, Data Centers, Network Address Translation, Trunking, Virtual Private Networks (VPN), Network Security, Network Troubleshooting, NetFlow, Network Monitoring, Routing, Network Segmentation, Network Administration, Remote Access Technology, Wireshark, Virtual Local Area Networks, Computer Networking Systems, Identity Services Engine, Network Access Control, Software Troubleshooting, Firewalls (Computer Science), Network Support, TACACS+ Protocol, Cisco
- **Published:** August 23, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9097257/network-administrator

## About the Role

* 3+ years of network administration experience supporting enterprise environments
 * Active TS/SCI clearance
 * Experience supporting enterprise routing and switching environments
 * Strong hands-on experience with Cisco routers and switches
 * Experience configuring and troubleshooting VLANs, routing, and network segmentation
 * Experience with Cisco ISE
 * Experience with Cisco DNA Center (DNAC)
 * Experience using Wireshark, NetFlow, or similar network troubleshooting tools
 * Knowledge of 802.1X, RADIUS, and TACACS+
 * Experience with firewalls, ACLs, NAT, and VPN technologies
 * Strong understanding of network security and access-control principles
 * CompTIA Security+ certification
 * CCNA certification
 * Strong troubleshooting, analytical, and communication skills
 * Ability to work effectively with infrastructure, systems, and security teams

## Description

* Manage, configure, and troubleshoot Cisco-based enterprise networks
 * Administer and support Cisco Identity Services Engine (ISE) and Cisco DNA Center (DNAC)
 * Configure and maintain VLANs, trunking, inter-VLAN routing, and network segmentation
 * Support enterprise routing and switching infrastructure
 * Monitor network performance and proactively identify and resolve connectivity issues
 * Troubleshoot network issues using tools such as Wireshark and NetFlow
 * Support network security technologies including firewalls, ACLs, NAT, and VPNs
 * Manage network access control technologies including 802.1X, RADIUS, and TACACS+
 * Support secure network operations within a highly regulated environment
 * Collaborate with network engineers, system administrators, infrastructure teams, and security teams
 * Participate in change management, incident response, and network maintenance activities
 * Document network configurations, troubleshooting procedures, and operational changes
 * Support data center and physical network infrastructure
 * Work with technical and non-technical stakeholders to resolve network issues and maintain reliable enterprise operations


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