Network Engineer

L3Harris is dedicated to recruiting and developing high-performing talent who are passionate about what they do. Our employees are unified in a shared dedication to our customers’ mission and quest for professional growth. L3Harris provides an inclusive, engaging environment designed to empower employees and promote work-life success. Fundamental to our culture is an unwavering focus on values, dedication to our communities, and commitment to excellence in everything we do. 

L3Harris is seeking a Network Engineer to support the design, implementation, maintenance, and security of classified network environments up to Top Secret in Salt Lake City, Utah. The successful candidate will serve as a mid-level technical contributor responsible for ensuring secure, reliable, and compliant network operations supporting mission-critical programs. 

This role requires strong experience with enterprise networking technologies, secure infrastructure design, and troubleshooting within controlled classified environments. The ideal candidate will be comfortable working independently, collaborating across multidisciplinary teams, and supporting lifecycle upgrades, compliance initiatives, and operational sustainment activities.  

Essential Functions 

• Design, implement, maintain, and troubleshoot classified network infrastructure supporting operations up to the Top Secret level.
• Engineer secure network solutions including routing, switching, firewall, and VPN technologies.
• Monitor and optimize network performance, availability, and capacity across mission-critical environments.
• Investigate and resolve complex network issues, outages, and security-related events.
• Support classified network compliance activities including system hardening, audit readiness, and accreditation efforts.
• Apply cybersecurity best practices to network architecture, segmentation, access controls, and device configuration.
• Create and maintain network diagrams, implementation plans, technical documentation, and standard operating procedures.
• Execute network changes in accordance with established configuration management and change control processes.
• Partner with cybersecurity, systems administration, and program teams to maintain secure and compliant infrastructure.
• Support technology refresh, network modernization, and lifecycle replacement efforts.
• Provide technical leadership and mentorship to less experienced team members as needed.
• Participate in on-call rotation, scheduled maintenance windows, and after-hours operational support as required 

Qualifications 

• Bachelor’s degree in Information Technology, Computer Science, Engineering, or related field and a minimum of 4 years of prior relevant experience, or Graduate degree and a minimum of 2 years of prior related experience, or in lieu of a degree, a minimum of 8 years of prior related experience.
• Active Secret security clearance required, or ability to obtain and maintain one as required by the program. 

Preferred Additional Skills 

Experience supporting DoD or other federal classified network environments. 

Familiarity with DISA STIGs, RMF, NIST 800-53, and related cybersecurity/compliance frameworks. 

CCNA certification. 

Experience with Cisco, Palo Alto, Juniper, or equivalent enterprise technologies. 

Additional certifications such as Security+, CCIE, CISSP or firewall/security vendor certifications. 

Experience with enclave architecture, cross-domain solutions, or air-gapped network environments. 

Experience supporting network modernization, infrastructure refresh, or mission systems integration efforts. 

Prior experience serving as a technical lead, senior engineer, or subject matter expert. 

Experience supporting enterprise network infrastructure in secure or classified environments. 

Experience with routers, switches, firewalls, VPNs, and network monitoring/management tools. 

Strong knowledge of TCP/IP, OSPF, BGP, VLANs, ACLs, STP, and QoS. 

Experience with secure network design, implementation, and sustainment. 

Ability to troubleshoot and resolve advanced network performance and connectivity issues. 

Experience with technical documentation, network diagrams, and formal change management processes. 

Strong communication and collaboration skills.