Principal Network Engineer – Cisco & Security

General Dynamics Information Technology (GDIT); Germantown (MD); On-site; USD 111,000 - 150,000; Full time

Job summary

General Dynamics Information Technology (GDIT) is seeking a Network Engineer Principal to design, implement, and troubleshoot complex Cisco-based networks supporting mission-critical government programs. You will work on LAN, MAN, and WAN environments, ensuring security, reliability, and scalability while coordinating with vendors and internal teams.

The role requires 10+ years of network engineering experience, DOE Q/TS eligibility, and strong Cisco, routing, and security expertise to maintain

Qualifications

• Bachelor's degree or equivalent years of experience; Cisco certification would be valuable.
• 10+ years of professional experience in network engineering, infrastructure design, and circuit troubleshooting involving routing & switching protocols.
• DOE Q or TS clearance required for security.
• Deep knowledge of Cisco routers, switches, firewalls, wireless technologies; Juniper and Palo Alto experience a plus.
• Expertise in BGP, OSPF, EIGRP, STP, RSTP, VXLAN, and LACP.
• Understanding of network security practices and compliance with organizational standards.

Responsibilities

• Infrastructure Design & Implementation: design, build, and implement network systems for LAN, MAN, and WAN environments.
• System Monitoring & Troubleshooting: monitor and diagnose network issues, perform root-cause analysis and optimize operations.
• Traffic Analysis & Capacity Planning: analyze network traffic patterns and plan capacity to support growth and performance.
• Vendor Coordination: interface with vendor support services for timely resolution and escalation during outages or performance degradations.
• System Configuration: determine hardware, operating systems, and platform specs to meet requirements.
• Quality Assurance: evaluate and test network products and technologies to ensure alignment with standards.

Skills

Network Firewalls

Network Infrastructures

Network Routers

Education

Bachelor's degree or equivalent years of experience

Job description

General Dynamics Information Technology (GDIT) is seeking a Network Engineer Principal to design, implement, and troubleshoot complex Cisco-based networks supporting mission-critical government programs. You will work on LAN, MAN, and WAN environments, ensuring security, reliability, and scalability while coordinating with vendors and internal teams.

The role requires 10+ years of network engineering experience, DOE Q/TS eligibility, and strong Cisco, routing, and security expertise to maintain