Senior Network Administrator TS/SCI | Onsite & Polygraph

General Dynamics Information Technology, Inc.; Washington (District of Columbia); On-site; USD 124,000 - 161,000; Full time

Benefits offered by this job

401K with company match

Paid time off

Career development opportunities

Job summary

General Dynamics Information Technology, Inc. seeks a Network Administrator in Washington, DC, on-site. This role demands TS/SCI with Polygraph and DoD 8570.01-M IAT II, CCNA at minimum; CCNP preferred. You will install and secure enterprise LAN/WAN, design networks, and mentor staff.

The position offers a challenging mission-focused IT environment with cutting-edge technologies and robust benefits.

Qualifications

• Technical Training, Certification(s) or Degree + 8 years.
• DoD 8570.01-M at the Information Assurance Tech (IAT) Level II and CCNA minimum; CCNP preferred.
• Active TS/SCI with Polygraph clearance.
• Location: 100% On-Site in Washington, DC.

Responsibilities

• Install, configure, and maintain enterprise LAN/WAN infrastructure, including routers, switches, firewalls, and VPNs.
• Independently design and build new network environments, including topology, configuration, and architecture planning.
• Configure and troubleshoot OSPF, RIP, and BGP routing protocols.
• Configure, maintain, and troubleshoot Cisco/Juniper enterprise switching (Catalyst, Nexus, EX, QFX).
• Design VLANs, trunking (802.1Q), inter-VLAN routing for multi-tenant environments.
• Manage STP/RSTP/MST and EtherChannel/LACP for redundancy and throughput.
• Administer Cisco ASA appliances, VPNs, and secure remote access.
• Enforce DoW/DISA STIGs and security baselines across infrastructure.
• Provide performance monitoring, root-cause analysis, and capacity planning.

Skills

Network infrastructures

Networking hardware

Network systems

Tools

Cisco

Juniper

Palo Alto

Job description

General Dynamics Information Technology, Inc. seeks a Network Administrator in Washington, DC, on-site. This role demands TS/SCI with Polygraph and DoD 8570.01-M IAT II, CCNA at minimum; CCNP preferred. You will install and secure enterprise LAN/WAN, design networks, and mentor staff.

The position offers a challenging mission-focused IT environment with cutting-edge technologies and robust benefits.