Tier 3 Network Engineer (Washington, DC)

Responsibilities: of the Tier 3 Network Engineer: Design, configure, administer, and maintain enterprise LAN/WAN infrastructure, including Cisco routers, switches, VPN appliances, and network security devices Configure and troubleshoot Cisco IOS/NX-OS routing and switching environments supporting secure enterprise networks Administer Palo Alto Next-Generation Firewalls, VPN configurations, and network security policies Install, configure, and maintain General Dynamics TACLANE encryption devices and associated cryptographic network infrastructure Manage and troubleshoot F5 load balancers, including GTM, BIG-IP DNS, and application traffic distribution Configure and troubleshoot Layer 2 switching and Layer 3 routing protocols, including BGP, VLANs, LACP, LLDP, and related networking technologies Monitor network performance, analyze traffic patterns, and troubleshoot complex connectivity, latency, and infrastructure issues Perform network vulnerability assessments, security patching, system hardening, and remediation activities Troubleshoot network outages and service disruptions impacting voice, video, and data communications Support network design, infrastructure upgrades, capacity planning, and performance optimization initiatives Maintain network asset inventories, configuration documentation, topology diagrams, and technical procedures Collaborate with cybersecurity and infrastructure teams to implement secure network architectures and enforce security requirements Support data center networking environments and integration with storage, virtualization, and server infrastructure Participate in incident response, root-cause analysis, and resolution of complex Tier III network escalations Support backup, disaster recovery, and network resiliency initiatives Provide technical recommendations, project updates, and engineering support to internal teams and federal stakeholders Qualifications: for the Tier 3 Network Engineer: Active DOE Q or Top Secret clearance Strong hands-on experience with Cisco routing and switching, including IOS and NX-OS configurations Experience configuring and administering Palo Alto Next-Generation Firewalls and VPN technologies Experience with General Dynamics TACLANE encryption devices, cryptographic networking, or GEM One management Hands-on experience with F5 load balancers, including GTM and BIG-IP DNS Strong understanding of subnetting, Layer 2 switching, Layer 3 routing, and enterprise LAN/WAN network architectures Proficiency with networking and security protocols, including BGP, VLANs, IPsec, TLS/SSL, SSH, DNS, ARP, LACP, LLDP, and 802.1X Experience troubleshooting complex network connectivity, routing, firewall, and performance issues Knowledge of network security, traffic analysis, packet inspection, vulnerability remediation, and systems hardening Familiarity with Windows and Linux/Unix operating systems and their integration with enterprise network services Compensation: for the Tier 3 Network Engineer includes: Salary: $165,000 - $175,000 Comprehensive Benefits Package including Medical, Dental, Vision, 401(k), PTO, and Paid Holidays #LI-MM1 #LI-ONSITE