Principal Network Engineer TS/SCI DoD SDN & Security

General Dynamics IT; Arlington (VA); On-site; USD 153,000 - 207,000; Full time

Benefits offered by this job

401K with company match

Competitive pay & PTO

Military-friendly workplace

Job summary

General Dynamics IT is seeking a Principal Network Engineer to lead a large, DoD-based enterprise network and mentor engineers. You will design, implement, and optimize core transport networks, ensuring security, performance, and reliability across 8,000+ devices.

The role requires top-level DoD security clearance, extensive Cisco/Juniper experience, and strong scripting/automation skills. Onsite at the Pentagon, you will shape network strategy and deliver critical infrastructure improvements.

Qualifications

• Active TS/SCI clearance (or Secret depending on role).
• 10+ years of IT/network engineering experience in complex, enterprise environments.
• Bachelor's degree in computer science or a related technical field.
• DoD 8570 IAT Level II certification.
• One or more active certifications: CCNA, CCNP, ACSA.
• Expertise with Cisco and Juniper networking platforms.
• Strong knowledge of TCP/IP, MPLS, OSPF, BGP, SDN, and 802.1X.
• Experience managing DNS, DHCP, IPAM, and NTP in multi-site environments.
• Familiarity with firewalls, IDS/IPS, VPNs, and vulnerability remediation.
• Proficiency with monitoring and analysis tools such as SolarWinds, NetScout, NetBrain, IBM NetCool, Infovista, Clearpass, Aruba, and Arista.
• Strong CLI configuration and hardware troubleshooting skills.
• Experience with network automation scripting.
• Onsite at the Pentagon.

Responsibilities

• Serve as a subject-matter expert for routing, switching, SDN architectures, and network performance.
• Design, implement, and maintain network hardware, services, and configurations aligned with enterprise standards.
• Lead advanced troubleshooting, incident response, root cause analysis, and on-call escalation efforts.
• Conduct daily monitoring to ensure the health, integrity, and availability of critical network infrastructure.
• Evaluate new technologies for compatibility with enterprise architecture and mission requirements.
• Develop and maintain installation, configuration, and operational documentation.
• Collaborate with cybersecurity teams to identify and remediate vulnerabilities.
• Provide technical leadership, mentoring, and customer-facing support.
• Develop scripts and automation solutions to streamline migration, integration, and administrative tasks.
• Support multiple projects, special initiatives, and cross-functional collaboration.
• Maintain current knowledge of emerging network technologies and best practices.

Skills

Cisco Networking Infrastructure

Firewalls Configuration

IT Troubleshooting

Juniper

Network Infrastructures

Education

Bachelor's degree in computer science or related technical field

DoD 8570 IAT Level II certification

Tools

CCNA

CCNP

ACSA

Job description

General Dynamics IT is seeking a Principal Network Engineer to lead a large, DoD-based enterprise network and mentor engineers. You will design, implement, and optimize core transport networks, ensuring security, performance, and reliability across 8,000+ devices.

The role requires top-level DoD security clearance, extensive Cisco/Juniper experience, and strong scripting/automation skills. Onsite at the Pentagon, you will shape network strategy and deliver critical infrastructure improvements.