Senior Network Engineer

About Agile Defense

At Agile Defense we know that action defines the outcome and new challenges require new solutions. That’s why we always look to the future and embrace change with an unmovable spirit and the courage to build for what comes next.

Our vision is to bring adaptive innovation to support our nation’s most important missions through the seamless integration of advanced technologies, elite minds, and unparalleled agility—leveraging a foundation of speed, flexibility, and ingenuity to strengthen and protect our nation’s vital interests.

Location:

Hybrid, Ashburn, VA

Clearance Level: Ability to successfully receive a DHS Customs and Border Protection background check (CBP BI), Public Trust

Serve as a Senior Network Engineer enabling the Department of Homeland Security (DHS) mission and enterprise network infrastructure. The applicant will be responsible for engineering, maintaining, configuring, and troubleshooting wide-area networks (WAN), local-area networks (LAN), SDWAN, Virtual Private Networks, wireless networks (WLAN), and perimeter security controls in accordance with customer standards and mandates.

• Bachelor’s degree in management information systems, Computer Science, Engineering, or a related technical field (e.g. Networking and Telecommunications) with 10+ years of experience performing network engineering or 14+ years of network engineering experience without a bachelor’s degree.
• Minimum of ten (10) years of verifiable network engineering experience supporting a large, complex Federal agency. Strong knowledge of networking protocols, such as TCP/IP, BGP, OSPF, EIGRP, MPLS, VPNs and VLANs.
• Expertise and experience with Cisco technology and Firewall technologies. Ability to perform firewall changes.
• Hands-on experience with SDN technologies such as Cisco ACI or VMware NSX. Excellent problem-solving and analytical skills, with the ability to troubleshoot complex network issues.
• Delivers high-level technical leadership to meet or exceed establishes project goals.

10 years

The Senior network engineer will be the technical lead performing the following:

• Network Engineering & Maintenance:
  Configure, deploy, and support enterprise-grade switches, routers, firewalls, VPN gateways, adhere to logging baselines and load balancers across DHS operational environments.
• Troubleshooting & Incident Management:
  Provide Tier 2/Tier 3 escalation support for network outages, circuit degradations, and performance issues; conduct root cause analyses (RCA) and coordinate vendor support.
• Architecture & Upgrades:
  Support the planning, installation, and cutover of network hardware upgrades, SD-WAN transitions, cloud interconnects (AWS/Azure/GCP), remote field sites and infrastructure modernization.
• Software Defined Wide Area Networking (SD-WAN):
  Design, implement, and maintain an SD-WAN solution that extends the principles of software-defined networking and supports multiple network transports (e.g., Dedicated Internet Access (DIA), Broadband Internet, MPLS, 4G/LTE/5G, and satellite) at remote sites. Use SD-WAN network virtualization capabilities, the SD-WAN solution to route traffic based on application type, pre-defined routing policies, and network performance requirements
• Documentation & Asset Management:
  Maintain accurate network diagrams (Visio), topology maps, inventory databases, standard operating procedures (SOPs), and change control tickets (Service Now/Remedy).
• Support On-Call & Escalation Management: support 24/7/365 on-call rotation readiness to respond to Tier 3 critical network incidents within SLA limits and coordinating cross-functional escalation pathways. When needed to restore services, the Senior Network Engineer will provide a solution and implement an Emergency Change Request (ECR), Emergency Break Fix (EBF), or Change Request.
• Root Cause Analysis (RCA) or Post Incident Reporting:
  Participate in the Root Cause Analysis (RCA) or post incident analysis of problems for mission critical applications, mission essential applications, and mission essential network infrastructure as well as recurring issues on the enterprise…