Junior Network Administrator (TS/SCI)
LeidosAbout the role
Mission One: Land The Job. Mission Two: Outdo What's Next. Come #OutsmartOutdo at Leidos!
Leidos is seeking a motivated TS/SCI cleared Junior Network Administrator to support the installation, configuration, and day-to-day management of enterprise network infrastructure. This role is an excellent opportunity for an early-career network professional to gain hands-on experience with routing and switching platforms, including Session Smart Router (SSR) / 128 Technology SD-WAN solutions, in a structured and security-conscious environment. The ideal candidate demonstrates a solid foundation in networking fundamentals, a willingness to learn vendor-specific technologies, and the discipline to operate within DoD network standards. The job duties will be performed on site at Langley Air Force Base, VA.
Roles and Responsibilities
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.
Basic Qualifications:
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.
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