Mission-Critical Network Engineer, TS/SCI Cleared, On-Site

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 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.