Senior Network Engineer — Mission-Critical DHS Network (Hybrid VA)

Agile Defense; Ashburn (VA); Hybrid; USD 120,000 - 140,000; Full time

Job summary

Agile Defense is seeking a Senior Network Engineer to enable DHS mission critical network infrastructure. You will engineer, configure, and troubleshoot WAN/LAN, SD-WAN, VPNs, WLAN, and perimeter security per customer standards.

Ideal candidates have 10+ years of network engineering experience, deep TCP/IP and BGP/OSPF knowledge, and hands-on Cisco technologies. Travel up to 35% within the United States is required.

Qualifications

• Ten years of verifiable network engineering experience with a large federal agency.
• Deep knowledge of TCP/IP, BGP, OSPF, EIGRP, MPLS, VPNs and VLANs.
• Expertise with Cisco technology and firewall changes.
• Hands-on SDN experience with Cisco ACI or VMware NSX.
• Strong problem-solving and analytical skills; capable of leading technical work.

Responsibilities

• Lead design, deployment, and maintenance of enterprise WAN/LAN and security controls.
• Provide Tier 2/3 escalation for outages and incidents; perform RCA analyses.
• Plan and execute upgrades, SD-WAN transitions, and cloud interconnects (AWS/Azure/GCP).
• Create and maintain Visio diagrams, topology maps, and SOPs; manage change tickets.
• Support on-call rotation and Emergency Change Requests when needed.

Skills

Network engineering

WAN/LAN

SD-WAN

Firewall & VPN

Cisco technologies

Troubleshooting

Education

Bachelor's degree or 14+ years of experience

Tools

Cisco security appliances

Firewall management

SDN (Cisco ACI/NSX)

ServiceNow/Remedy

Job description

Agile Defense is seeking a Senior Network Engineer to enable DHS mission critical network infrastructure. You will engineer, configure, and troubleshoot WAN/LAN, SD-WAN, VPNs, WLAN, and perimeter security per customer standards.

Ideal candidates have 10+ years of network engineering experience, deep TCP/IP and BGP/OSPF knowledge, and hands-on Cisco technologies. Travel up to 35% within the United States is required.