Senior Network Administrator

Leidos Inc; Hampton (VA); On-site; USD 92,000 - 167,000; Full time

Job summary

Leidos Inc. is seeking a Senior Network Administrator with active TS/SCI clearance to support installation, configuration, and day-to-day management of enterprise network infrastructure on site at Langley Air Force Base, Virginia.

The position emphasizes hands-on work with SSR/128 Technology platforms, routing and switching disciplines, and DoD network standards. The role requires a strong foundation in networking fundamentals, a willingness to learn vendor-specific technologies, and the

Qualifications

• Bachelor's degree with 8+ years of experience or Master’s with 6+ years.
• Equivalent years of experience may be considered in lieu of degree.

Responsibilities

• Configure, deploy, and manage routers, switches, and SSR appliances across enterprise networks.
• Design and implement routing policies and traffic steering configurations on SSR/128 Technology platforms.
• Manage VLAN configuration, STP, trunking, and port security on Juniper/Cisco devices.
• Troubleshoot BGP/OSPF across WAN and data center environments.
• Monitor network health and assist root-cause analysis; maintain SOPs and diagrams.

Skills

Routing & Switching

BGP

OSPF

IPsec VPN

LAN switching

Troubleshooting

Education

Bachelor's degree with 8+ years experience

Master's degree with 6+ years experience

Tools

Juniper EX Series

Cisco Catalyst

Session Smart Router

128 Technology SSR

Job description

The Defense Sector at Leidos isseeking a motivated TS/SCI cleared Senior 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 candidatedemonstratesa solid foundation in networking fundamentals, a willingness to learn vendor‑specific technologies, and the discipline tooperatewithin DoDnetwork standards.

The job duties will be performed daily on site at Langley Air Force Base, VA.

Roles and Responsibilities:

• Assistin 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.

• Assistwith 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; elevate anomalies andassistin root cause analysis.

• Support configuration and maintenance offirewallrules, 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 devicesin accordance withchange management procedures.

• Maintainaccurateand 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 andassistwith troubleshooting during network outages or degraded service events.

Basic Qualifications:

• Bachelor's degree with 8+ years of experience or a Master's degree with 6+ years of experience. Additional years of experience may 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+ CErequiredat minimum.

• Demonstratedunderstanding 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, andtrunking.

• Strong analytical and troubleshooting mindset, clear written and verbal communication, and the ability to work effectively in a team environment under supervision.

Preferred Qualifications:

• Juniper Networks Certified Associate (JNCIA‑Junos) or progress toward JNCIS‑ENT; Juniper SSR‑specific training or certification a strong plus or Cisco CCNA.

• Familiarity with Border Gateway Protocol - including eBGP and iBGP concepts, peer configuration, route policies, and basic troubleshooting in a multi‑site or service provider‑adjacent environment.

• Exposure to Juniper Session Smart Router (formerly 128 Technology) platforms, including familiarity with session‑based routing, service and tenant models, or WAN traffic steering concepts.

• Hands‑on experience with advanced switching features such as RSTP/MSTP, LACP/LAG, Q‑in‑Q, or Layer 3 switching on either Juniper EX Series or Cisco Catalyst hardware.

• Working knowledge of IPsec VPN configuration, zone‑basedfirewallpolicies, or experience with Juniper SRX Series security platforms.

• Basic familiarity with network automation tools or scripting (Python, Ansible, or Junos) for configuration management or compliance checks.

• CompTIA Network+, or other vendor‑neutral networking credentialsdemonstratinga broad networking foundation.

Pay Range: Pay Range $92,300.00 - $166,850.00

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available at www.leidos.com/careers/pay-benefits.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.

About Leidos

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $16.7 billion for the fiscal year ended January 3, 2025. For more information, visit www.Leidos.com.

Commitment to Non-Discrimination

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.

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