Network Engineer w/active Top Secret clearance

LMI • Washington, DC

2d • Hybrid

About The Position

LMI is a new breed of digital solutions provider dedicated to accelerating government impact with innovation and speed. Investing in technology and prototypes ahead of need, LMI brings commercial-grade platforms and mission-ready AI to federal agencies at commercial speed. Leveraging our mission-ready technology and solutions, proven expertise in federal deployment, and strategic relationships, we enhance outcomes for the government, efficiently and effectively. With a focus on agility and collaboration, LMI serves the defense, space, homeland, healthcare, and intel sectors— helping agencies navigate complexity and outpace change. Headquartered in Tysons, Virginia, LMI is committed to delivering impactful results that strengthen missions and drive lasting value.

Requirements

• Bachelor's degree in a related field or equivalent experience.
• 5+ years of network engineering experience, including in classified environments.
• Working knowledge of routing, switching, and network security fundamentals.
• Relevant certification (e.g., CCNA, CCNP, Security+).
• Familiarity with ICD 705 physical security standards for SCIF design and accreditation.
• Familiarity with the Risk Management Framework (RMF) per NIST SP 800-37 and NIST SP 800-53 for system security authorization.
• TS/SCI clearance and SAP eligibility are for this position.
• Applicants selected will be subject to a government security investigation and must meet eligibility requirements for access to classified information.
• LMI will only consider applicants with current security clearances.
• Only U.S. citizens are eligible for a security clearance.

Nice To Haves

• Experience supporting cross-domain or multi-level security network solutions.
• Experience deploying networks in newly constructed or renovated facilities.
• Demonstrated experience leading or supporting large, geographically dispersed teams.
• Experience supporting Special Access Program (SAP) facilities, systems, or environments.

Responsibilities

• Design, install, configure, and maintain classified network infrastructure across facility locations.
• Troubleshoot network performance, connectivity, and security issues.
• Support cross-domain solutions and secure network interconnects between sites.
• Collaborate with security and systems teams to ensure networks meet accreditation requirements.
• Maintain network documentation, diagrams, and configuration baselines.
• Support design and integration of video teleconferencing (VTC) and conference room AV capability across all program sites, including classified and unclassified variants.
• Support network and security operations center (NOC/SOC) functions, including monitoring tools, coverage models, and 24x7 support.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior