Specialist, Network Engineer (Top Secret Clearance Required)

L3Harris Technologies•Dahlgren, VA

12d•$88,500 - $164,500•Onsite

About The Position

L3Harris is seeking an experienced Network Engineer to support Space Domain Awareness mission solutions for the United States Space Force. The role designs, operates, troubleshoots, and secures enterprise networks, with particular focus on Juniper, Cisco, Palo Alto, automation, and compliance. The engineer serves as a technical lead for local network modernization, resolves advanced Layer 2 and Layer 3 issues, supports Zero Trust initiatives, maintains DISA STIG compliance, and executes changes in high-availability environments with minimal or no downtime. The position is onsite at Naval Support Facility Dahlgren, Virginia, and follows a 9/80 schedule with every other Friday off. Up to 10% travel may be required. The engineer may also support after-hours maintenance windows and on-call response for mission-critical outages as needed.

Requirements

Must hold an active Top Secret clearance and be able to obtain SCI access within six months of hire.
Bachelor’s degree in Network Engineering, Information Technology, Cybersecurity, or a related field and at least 4 years of relevant experience; or a graduate degree and at least 2 years of related experience; or, in lieu of a degree, at least 8 years of relevant experience.
At least 6 years of experience supporting enterprise network infrastructure in a DoD, federal, or similarly regulated environment.
Strong hands-on experience configuring, maintaining, troubleshooting, and managing the lifecycle of Juniper and Cisco network devices.
Experience applying and maintaining DISA STIG compliance across network devices.
Experience leading technical training, mentoring junior staff, or serving as a team subject matter expert.
Experience with network automation using scripting, templates, or similar tools.

Nice To Haves

Ability to troubleshoot complex network issues across multi-site or large-scale environments.
Experience producing technical documentation, including diagrams, SOPs, and engineering procedures.
Ability to work independently and collaboratively in operationally sensitive, mission-critical environments.
Experience managing multi-vendor network fabrics using Apstra Data Center Director for provisioning, visibility, automation, and lifecycle management.
Hands-on experience troubleshooting on-premises and off-premises fiber-optic infrastructure, including fiber patching, light-level verification, and circuit handoff coordination with DISA or other government and commercial entities.
Experience implementing Zero Trust Architecture using Cisco ISE or similar technologies.
Experience configuring Arista and Dell network devices.
Experience supporting large-scale enterprise environments with thousands of endpoints and hundreds of network devices.
Experience performing zero-downtime upgrades in high-availability environments.
Experience with enterprise monitoring and management platforms such as SolarWinds.
Experience supporting classified network environments.
Hands-on experience installing, configuring, managing, and troubleshooting ViaSat and GDMS Type 1 encryptors, including COMSEC/keying coordination.
Experience coordinating with multiple internal and external organizations before, during, and after planned network changes, emergency remediation, and mission-critical maintenance windows.
Experience submitting vendor support cases for immediate resolution.
Experience with network audits, IP space analysis, and address management.
Familiarity with PL1 or similarly controlled facilities.
Active Security+ CE certification.

Responsibilities

Design, implement, maintain, and troubleshoot enterprise network infrastructure across classified and unclassified environments.
Administer and optimize network deployments.
Support routing and switching operations, including BGP, OSPF, VLANs, STP, and enterprise segmentation.
Perform advanced root cause analysis and resolve complex network incidents affecting mission-critical operations.
Plan and execute network upgrades, patching, and lifecycle refresh efforts with minimal operational impact.
Develop and maintain network diagrams, SOPs, TTPs, implementation plans, and technical documentation.
Automate network configuration, compliance, and deployment tasks using scripting and templating tools.
Implement and maintain DISA STIG-compliant network configurations across enterprise devices.
Support Zero Trust Architecture initiatives through posture assessment, profiling, policy enforcement, and access control.
Manage enterprise-scale switch provisioning and configuration standardization efforts.
Monitor network health, availability, and performance using enterprise management tools.
Provide technical guidance and escalation support to junior engineers and technicians.
Coordinate with cybersecurity, systems, COMSEC, and external organizations to support network changes and vulnerability remediation.
Deliver technical briefings and status updates to leadership and stakeholders.
Support after-hours maintenance windows and on-call response for mission-critical outages, as needed.