Senior Network Administrator - TS/SCI Poly | Onsite

General Dynamics IT; United States; On-site; USD 124,000 - 161,000; Full time

Job summary

General Dynamics IT seeks a Network Administrator to support enterprise LAN/WAN infrastructure with a Top Secret/Sci + Polygraph clearance. The role requires hands-on configuration of routers, switches, firewalls, and VPNs, plus integration of DoD security baselines. Expect to mentor staff and collaborate with engineering teams on upgrades.

On-site position in the Washington DC area with 8+ years of experience. CCNA is required; CCNP preferred.

Qualifications

• Active TS/SCI with Polygraph required.
• DoD 8570.01-M IAT II certification required; CCNA minimum; CCNP preferred.
• 8+ years of network administrator experience.
• Location: 100% on-site; DC area on-site required.
• Strong knowledge of OSPF, RIP, and BGP routing; ACLs and Cisco routing/switching.

Responsibilities

• Install, configure, and maintain enterprise LAN/WAN infrastructure (routers, switches, firewalls, VPNs).
• Independently design and build new network environments (topology, configuration, architecture).
• Configure and troubleshoot dynamic routing protocols (OSPF, RIP, BGP).
• Configure and apply standard ACLs to enforce security policies.
• Manage Cisco ASA appliances and VPN solutions; secure remote access.
• Enforce security baselines (DoW/DISA STIGs) across network infrastructure.
• Monitor and optimize network performance for high availability and security.

Skills

Network Infrastructures

Networking Hardware

Network Systems

Education

Technical Training / Certification / Degree

Tools

Cisco

Juniper

ASA/Firepower

Palo Alto

VPN

DoD 8570

Job description

General Dynamics IT seeks a Network Administrator to support enterprise LAN/WAN infrastructure with a Top Secret/Sci + Polygraph clearance. The role requires hands-on configuration of routers, switches, firewalls, and VPNs, plus integration of DoD security baselines. Expect to mentor staff and collaborate with engineering teams on upgrades.

On-site position in the Washington DC area with 8+ years of experience. CCNA is required; CCNP preferred.