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# Network Engineer Tier 3

- **Company:** Zachary Piper
- **Location:** Washington, DC, United States
- **Experience:** Expert
- **Salary:** $175,000.0
- **Contract:** Permanent contract
- **Skills:** Secure Shell (SSH), IEEE 802.1X, Link Aggregation (Ethernet), Address Resolution Protocols, Apple IOS, Application Firewall, Backup Devices, Border Gateway Protocol, Cisco Routers, Complex Networks, Data Centers, Disaster Recovery, Domain Name System (DNS), Internet Protocol Security (IP SEC), Virtual Private Networks (VPN), Network Security, Network Layer, Network Planning and Design, Network Monitoring, Network Protocols, Remote Access Technology, Virtual Local Area Networks, Virtualization Technology, Wide Area Networks, Transport Layer Security, Load Balancing, Nx-os, Firewalls (Computer Science), Information Technology, Patch Management, 3-tier Architectures, Cisco
- **Published:** October 16, 2026
- **Apply:** https://www.clearancejobs.com/jobs/9245183/network-engineer-tier-3

## About the Role

* 7+ years of experience supporting enterprise network engineering, administration, and infrastructure operations
 * Hands-on experience with Cisco routing and switching (IOS/NX-OS), Palo Alto firewalls, VPN technologies, F5 Load Balancers, GTM/Big-IP DNS, and General Dynamics TACLANE encryption devices
 * Strong knowledge of Layer 2 and Layer 3 networking protocols including BGP, VLANs, LACP, LLDP, ARP, DNS, IPsec, TLS/SSL, SSH, 802.1X, and network performance tuning
 * Bachelor's degree in Information Technology, Computer Science, Engineering, or a related technical field (or equivalent professional experience)
 * Active DOE Q Clearance or Top Secret Clearance

## Description

* Install, configure, maintain, and optimize enterprise LAN/WAN networks, including Cisco routers, switches, VPN solutions, load balancers, and security appliances
 * Troubleshoot and resolve complex network, voice, video, and data service issues while monitoring network performance and implementing improvements
 * Manage and support network security initiatives, including firewall administration, system hardening, patch management, and implementation of security best practices
 * Support data center operations, virtualization environments, infrastructure expansion projects, backup solutions, and disaster recovery initiatives
 * Collaborate with engineering teams and stakeholders on network design, upgrades, documentation, asset management, and infrastructure modernization efforts