Senior Network Security Engineer — Firewalls & WAN/LAN

General Dynamics Information Technology, Inc.; Herndon (VA); On-site; USD 145,000 - 196,000; Full time

Benefits offered by this job

401K with company match

Health and wellness packages

Internal mobility team supporting your

Professional growth including paid ed.

Paid vacation and holidays

Job summary

General Dynamics Information Technology, Inc. is seeking a seasoned Network Engineer to design and oversee complex IT infrastructure solutions. You will provide technical oversight, interpret requirements, and allocate tasks across components while aligning with security and best practices.

This role requires extensive experience with LAN/WAN, firewalls, and TS/SCI with Poly. You will collaborate with admins and developers, mentor junior engineers, and help plan capacity, monitoring, backups,

Qualifications

• Active TS/SCI with Poly clearance.
• Bachelor's or Technology degree in Engineering or related field, or equivalent.
• 14 years job-related experience.
• 10+ years of related Network Engineering experience.
• 12+ years configuring/maintaining Cisco ASA/NGFW.
• 10+ years configuring, designing, maintaining LAN/WAN devices.
• Proficient in routing concepts (EIGRP, OSPF, BGP, IP MPLS).

Responsibilities

• Define, maintain, and upgrade the overall security posture of the networks.
• Perform security audits and implement changes to improve security posture.
• Manage and allocate network installation and engineering tasks; configure LAN/WAN devices.
• Write build-to and as-built documentation and test plans for IT installations.
• Engage in system planning beyond the network for applications and systems.
• Provide expert analysis of voice, video, and data networks; upgrade OS and protocols.
• Mentor junior network engineers and support troubleshooting (Tier I–III).

Skills

Cisco ASA Firewall

LAN

Networks

Education

Bachelor's or Technology degree in Engineering or related field

Job description

General Dynamics Information Technology, Inc. is seeking a seasoned Network Engineer to design and oversee complex IT infrastructure solutions. You will provide technical oversight, interpret requirements, and allocate tasks across components while aligning with security and best practices.

This role requires extensive experience with LAN/WAN, firewalls, and TS/SCI with Poly. You will collaborate with admins and developers, mentor junior engineers, and help plan capacity, monitoring, backups,