Network Engineer

Leidos Inc; Hampton (VA); On-site; USD 73,000 - 133,000; Full time

Job summary

Leidos in the Defense Sector seeks a TS/SCI-cleared Network Engineer to support installation, configuration, and day-to-day management of enterprise infrastructure at Langley AFB. The role focuses on SSR/128 Technology SD-WAN, routing, switching, and security in a DoD context.

The ideal candidate has a solid networking foundation and is eager to learn vendor-specific tech, with readiness to work on-site in a security-conscious environment.

Qualifications

• Bachelor's degree with 4+ years of experience (or Master's with 2+ years).
• Active and current DoD TS/SCI clearance.
• DoD 8570/8140 IAT Level II - Security+ CE or higher.
• Solid understanding of OSI model, TCP/IP, subnetting, VLANs, BGP/OSPF, WAN techs.
• LAN switching experience on Juniper EX Series or Cisco Catalyst (VLANs, STP, trunking).
• Ability to work in a DoD security-conscious, team environment.

Responsibilities

• Assist configuring and managing routers, switches, SSR appliances.
• Support routing policy design and traffic steering on SSR/128 Tech platforms.
• LAN switching administration: VLANs, STP, trunking on Juniper/Cisco gear.
• Assist with routing protocols (OSPF, BGP) across WAN and data centers.
• Monitor network health and escalate anomalies with root-cause analysis.
• Configure firewall rules, ACLs, IPsec VPNs, and security controls.
• Upgrade software/firmware and manage change procedures.
• Maintain network diagrams, inventories, and SOPs.
• Coordinate with senior engineers, admins, and security to resolve incidents.
• Participate in on-call rotation and troubleshooting during outages.

Skills

Networking fundamentals

Routing protocols (BGP, OSPF)

LAN switching

SSR / 128 Technology SD-WAN

Network security (ACLs, VPN)

Scripting (Python, Ansible)

Education

Bachelor's degree +4+ years

Master's degree +2+ years

Tools

Juniper EX Series

Cisco Catalyst

Session Smart Router

128 Technology SD-WAN

Juniper SRX

VPN/IPsec

Job description

Description

The Defense Sector at Leidos isseeking a motivated TS/SCI cleared Network Engineer 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; escalate 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 4+ years of experience or a Master's degree with 2+ 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.

DABAOPP1

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.

Original Posting:September 1, 2026

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:Pay Range $73,450.00 - $132,775.00

The Leidos pay range for this job level is a general guideline onlyand not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

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.

Pay and Benefits

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.

Securing Your Data

Beware of fake employment opportunities using Leidos' name. Leidos will never ask you to provide payment-related information during any part of the employment application process (i.e., ask you for money), nor will Leidos ever advance money as part of the hiring process (i.e., send you a check or money order before doing any work). Further, Leidos will only communicate with you through emails that are generated by the Leidos.com automated system - never from free commercial services (e.g., Gmail, Yahoo, Hotmail) or via WhatsApp, Telegram, etc. If you received an email purporting to be from Leidos that asks for payment-related information or any other personal information (e.g., about you or your previous employer), and you are concerned about its legitimacy, please make us aware immediately by emailing us at [e-mail].

If you believe you are the victim of a scam, contact your local law enforcement and report the incident to the U.S. Federal Trade Commission.

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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