Senior Network Engineer

Leidos; Laurel (MD); On-site; USD 116,000 - 210,000; Full time

Benefits offered by this job

Paid Time Off

11 paid holidays

401(k) with 6% company match

Employee Stock Purchase Plan

Technical upskilling & professional‑de

Education & training support

Paid parental leave

Health & wellness benefits

Job summary

Leidos is seeking an experienced Network Engineer to design, deploy, and optimize secure mission networks in a on-site, high-security environment. You will work with systems engineers, cybersecurity teams, and mission partners to ensure resilient network performance, including IPsec, NAT, and WAN optimization, while providing technical leadership to junior engineers.

The role requires TS/SCI clearance with polygraph, CCNP or equivalent, and a strong track record in complex network environments.

Qualifications

• Twelve (12) years of experience as a Network Engineer on programs and contracts of similar scope, type, and complexity.
• Bachelor's degree in a technical discipline from an accredited college or university. Five (5) years of experience in Network Engineering disciplines may be substituted for the bachelor's degree.
• Active TS/SCI clearance with Polygraph and ability to work full-time on site in a secure mission environment.
• Current Cisco Certified Network Professional (CCNP) certification in an applicable networking discipline, or an equivalent certification approved by the program.
• Demonstrated experience designing, configuring, implementing, troubleshooting, and optimizing complex network and telecommunications environments, including routing protocols, BGP, policy-based routing, tunneling, IPsec, NAT, WAN technologies, traffic management, and network performance analysis.
• Experience configuring, testing, installing, troubleshooting, and maintaining enterprise network and security infrastructure, including routers, firewalls, intrusion detection systems, cryptographic devices, and related network technologies.
• Demonstrated ability to diagnose and resolve complex network and telecommunications problems, develop and document technical solutions, and provide technical guidance and leadership to junior and mid-level Network Engineers.

Responsibilities

• Design, engineer, deploy mission networks - design, build, integrate, test, document, and deploy secure network and telecommunications solutions supporting complex mission requirements.
• Engineer solutions incorporating routing protocols, BGP, policy-based routing, traffic shaping, tunneling, IPsec, NAT, firewall contexts, load balancing, WAN acceleration, and network monitoring.
• Operate, secure & optimize network infrastructure - configure, install, maintain, and optimize network and telecommunications infrastructure.
• Troubleshoot complex network & telecommunications challenges - lead investigation, diagnostics, and resolution of complex network incidents and performance issues.
• Provide technical leadership & mission integration - partner with systems engineers, cybersecurity, NOCs, providers, and cross‑organizational teams.

Skills

Routing protocols

BGP

IPsec

NAT

WAN technologies

Traffic analysis

Network performance

Troubleshooting

Technical leadership

Education

Bachelor's degree

Tools

Cisco routers

Firewalls

Intrusion detection

Cryptographic devices

Job description

Leidos - Cyber & Analytics Business Area, Key Management & Analytics Division

Leidos has an exciting opportunity for an experienced Network Engineer to join our Cyber & Analytics Business Area, Key Management & Analytics Division, supporting critical national-security missions.

Job Description

This is an opportunity to apply deep network engineering expertise to complex, mission-critical environments—from designing and optimizing secure networks to deploying communications capabilities, troubleshooting complex problems, integrating emerging technologies, and guiding other network engineers.

You'll work alongside systems engineers, cybersecurity professionals, technical teams, and mission partners to ensure network and telecommunications capabilities are secure, resilient, optimized, and ready to perform when the mission demands it.

This is a full-time, on-site position in a secure mission environment. Due to the nature of the work and security requirements, remote work is not available for this position.

If you're an experienced network engineer who enjoys solving difficult technical problems and wants to see your expertise translate directly into mission capability, we'd like to talk.

What You'll Do

• Design, Engineer & Deploy Mission Networks - Design, build, integrate, test, document, and deploy secure network and telecommunications solutions supporting complex mission requirements. Engineer solutions incorporating routing protocols, BGP, policy-based routing, traffic shaping, tunneling, IPsec, NAT, firewall contexts, load balancing, WAN acceleration, and network monitoring, while integrating new technologies as mission needs evolve.
• Operate, Secure & Optimize Network Infrastructure - Configure, install, maintain, and optimize network and telecommunications infrastructure, including routers, firewalls, intrusion detection systems, cryptographic devices, VoIP, VTC, POTS, and VSAT satellite communications systems. Monitor accredited environments, analyze traffic and TCP performance, minimize latency, maximize throughput, and help ensure the required security and operational posture is maintained.
• Troubleshoot Complex Network & Telecommunications Challenges - Lead investigation, diagnostics, and resolution of complex network incidents and performance issues. Analyze system logs, traffic characteristics, connectivity, transmission speeds, packet behavior, and throughput; identify root causes and develop, test, document, and implement solutions and workarounds. Assess and apply patches, updates, configuration changes, backup procedures, and corrective actions using approved methods and procedures.
• Provide Technical Leadership & Mission Integration - Partner with systems engineers, cybersecurity professionals, external Network Operations Centers (NOCs), telecommunications providers, and cross-organizational teams to translate mission requirements into effective technical solutions. Maintain network diagrams and configuration documentation, support Certification and Accreditation (C&A) requirements, and provide technical leadership and guidance to Level 0-2 Network Engineers, validating their work and ensuring approved engineering methods and procedures are followed.

What You'll Bring

This position requires an experienced cybersecurity professional with demonstrated Information Systems Security Officer experience supporting programs and contracts of comparable scope, type, and complexity.

Basic Qualifications

• Twelve (12) years of experience as a Network Engineer on programs and contracts of similar scope, type, and complexity.
• Bachelor's degree in a technical discipline from an accredited college or university. Five (5) years of experience in Network Engineering disciplines may be substituted for the bachelor's degree.
• Active TS/SCI clearance with Polygraph and ability to work full-time on site in a secure mission environment.
• Current Cisco Certified Network Professional (CCNP) certification in an applicable networking discipline, or an equivalent certification approved by the program.
• Demonstrated experience designing, configuring, implementing, troubleshooting, and optimizing complex network and telecommunications environments, including routing protocols, BGP, policy-based routing, tunneling, IPsec, NAT, WAN technologies, traffic management, and network performance analysis.
• Experience configuring, testing, installing, troubleshooting, and maintaining enterprise network and security infrastructure, including routers, firewalls, intrusion detection systems, cryptographic devices, and related network technologies.
• Demonstrated ability to diagnose and resolve complex network and telecommunications problems, develop and document technical solutions, and provide technical guidance and leadership to junior and mid-level Network Engineers.

Preferred Qualifications

• Hands-on experience configuring, administering, troubleshooting, and optimizing Palo Alto Networks firewalls, including security policies, NAT, routing, logging, and traffic analysis.
• Experience with VoIP, Video Teleconferencing (VTC), POTS, and/or VSAT TDMA IP-based satellite communications systems.
• Experience performing advanced TCP/IP and network performance analysis, including troubleshooting latency, throughput, packet flow, and end-to-end network performance.
• Experience supporting accredited network environments, including configuration management, security compliance, and Certification and Accreditation (C&A) activities.
• Experience introducing, evaluating, and integrating new network and telecommunications technologies into complex operational environments.

Why Leidos?

At Leidos, you'll work alongside talented technical and mission professionals solving complex challenges where cybersecurity is fundamental to mission success.

You’ll have opportunities to continue developing your expertise while contributing to consequential national-security work and connecting with the breadth of technical capabilities and career opportunities across Leidos.

Eligible employees have access to a competitive benefits package that includes:

• Paid Time Off
• 11 paid holidays
• 401(k) with a 6% company match and immediate vesting
• Employee Stock Purchase Plan
• Technical upskilling and professional-development opportunities
• Education and training support
• Paid parental leave
• Additional health, wellness, and employee benefits

Pay Range

Pay Range $116,350.00 - $210,325.00

Original Posting

November 2, 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.

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.