Network Security Engineer - TS/SCI Clearance

General Dynamics Information Technology; Herndon (VA); On-site; USD 110,000 - 140,000; Full time

Benefits offered by this job

401K with company match

Comprehensive health and wellness

Internal mobility support

Professional growth opportunities

Cutting-edge technology access

Paid vacation and holidays

Job summary

General Dynamics Information Technology, Inc. is seeking a Network Engineer to provide technical oversight for IT infrastructure projects at customer sites in the Herndon area.

The role includes security-focused design, capacity planning, and integration of LAN/WAN hardware and software, with emphasis on firewalls, VPNs, and monitoring. Candidates should have an active TS/SCI with Polygraph clearance, 5+ years of network engineering, and hands-on experience with Cisco ASA/NGFW, Palo Alto or

Qualifications

• Active TS/SCI with Polygraph clearance required.
• Bachelor's or Tech degree or equivalent 9 years relevant experience.
• 5+ years of Network Engineering experience.
• 3+ years configuring Cisco ASA/Next Generation Firewall.
• 4+ years designing, maintaining and troubleshooting LAN/WAN devices.
• Experience deploying and managing multi-firewall environments.
• Experience designing and deploying secure interfaces and firewall transitioning plans.
• Experience with VPN solutions and PKI-based auth.

Responsibilities

• Define, maintain, and upgrade network security posture.
• Perform security audits and implement improvements.
• Manage network installation tasks and configure LAN/WAN devices including firewalls and routers.
• Create build-to and as-built docs and test plans for IT installations.
• Engage in system planning beyond the network for application support.
• Provide expert analysis of voice/video/data networks and protocols.
• Plan network layouts and configure systems for user environments.
• Provide Tier I–III technical support as needed.

Skills

Network engineering

Firewall configuration

LAN/WAN design

VPN tech

QoS concepts

Network monitoring

Troubleshooting

Documentation

Stakeholder collaboration

Problem solving

Education

Bachelor's degree in Engineering or related field

Tools

Cisco ASA/NGFW

Palo Alto

Juniper

Job description

General Dynamics Information Technology, Inc. is seeking a Network Engineer to provide technical oversight for IT infrastructure projects at customer sites in the Herndon area.

The role includes security-focused design, capacity planning, and integration of LAN/WAN hardware and software, with emphasis on firewalls, VPNs, and monitoring. Candidates should have an active TS/SCI with Polygraph clearance, 5+ years of network engineering, and hands-on experience with Cisco ASA/NGFW, Palo Alto or