Junior Network Administrator – TS/SCI

Leidos

TS/SCI cleared Junior Network Administrator at Leidos supporting network infrastructure management and configuration. Engaging in hands-on experience with routing and switching platforms in a security-conscious environment.

Posted 6/13/2026full-timeHampton • Virginia • 🇺🇸 United StatesJunior💰 $73,450 - $132,775 per yearWebsite

Tech Stack

Tools & technologies

SwitchingTCP/IPTypeScript

About the role

Key responsibilities & impact

Assist in the configuration, deployment, and ongoing management of routers, switches, and Session Smart Router (SSR) appliances across enterprise and edge network environments.
Support the design and implementation of routing policies, service policies, and traffic steering configurations on SSR/128 Technology platforms under senior engineer guidance.
Perform LAN switching administration — including VLAN configuration, spanning tree, trunking, and port security — on Juniper EX Series and/or Cisco Catalyst platforms.
Assist with the configuration and troubleshooting of routing protocols including OSPF and BGP (eBGP and iBGP) across enterprise WAN and data center environments.
Monitor network health, availability, latency, and throughput using network management tools; escalate anomalies and assist in root cause analysis.
Support configuration and maintenance of firewall rules, access control lists (ACLs), IPsec VPN tunnels, and other network security controls.
Execute software and firmware upgrades, patch management, and lifecycle maintenance activities for network devices in accordance with change management procedures.
Maintain accurate and up-to-date network diagrams, device inventories, and standard operating procedures (SOPs).
Coordinate with senior network engineers, system administrators, and security personnel to resolve network incidents and support planned infrastructure changes.
Participate in on-call rotation and assist with troubleshooting during network outages or degraded service events.

Requirements

What you’ll need

Bachelor's degree in Network Engineering, Computer Science, Information Technology, or a related field — or additional equivalent hands-on years of experience and certifications will be considered in lieu of degree.
Must have active and current DoD TS/SCI Clearance.
DoD 8570/8140-compliant certification at IAT Level II - CompTIA Security+ CE required at minimum.
Demonstrated understanding of OSI model, TCP/IP, subnetting, VLANs, routing protocols (BGP, OSPF, static routing), and WAN technologies.
Practical experience with LAN switching concepts on Juniper EX Series or Cisco Catalyst platforms, including VLANs, STP, and trunking.
Strong analytical and troubleshooting mindset, clear written and verbal communication, and the ability to work effectively in a team environment under supervision.

Benefits

Comp & perks

competitive compensation
Health and Wellness programs
Income Protection
Paid Leave
Retirement

ATS Keywords

✓ Tailor your resume

Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

routing protocolsOSPFBGPVLAN configurationspanning treetrunkingport securityfirewall rulesIPsec VPNnetwork management

Soft Skills

analytical mindsettroubleshootingwritten communicationverbal communicationteamwork

Certifications

Bachelor's degree in Network EngineeringCompTIA Security+ CEDoD TS/SCI Clearance