Senior Network Engineer

Leidos is seeking a Senior Network Engineer to support Federal Civil customer in the Washington, DC metropolitan area. LOCATION: This position is remote; however, prefer candidates that are within driving distance to the Washington, DC area.

SUMMARY: The Senior Network Engineer will serve as a senior technical contributor responsible for designing, implementing, optimizing, and sustaining complex network solutions spanning on-premises infrastructure and hybrid cloud environments. The position requires technical expertise, independent problem-solving, and the ability to develop effective solutions to complex network challenges involving multiple technologies and technical disciplines. The successful candidate will collaborate with customer stakeholders, engineering teams, cybersecurity professionals, and program leadership to maintain network availability, performance, and security while supporting infrastructure modernization and evolving mission requirements. This role also provides technical guidance to other engineers and contributes to network architecture, engineering standards, and continuous operational improvement. CLEARANCE REQUIREMENTS: Must have or able to obtain a Public Trust clearance; Must be a US Citizen. PRIMARY RESPONSBILITIES: Serve as a Senior technical and escalation resource for complex network engineering and operational issues affecting mission-critical enterprise infrastructure. Lead the planning, design, implementation, and optimization of complex network infrastructure solutions across geographically distributed, multi-vendor environments. Independently analyze complex technical challenges involving multiple systems and disciplines, develop engineering solutions, and implement corrective actions that improve network reliability, performance, and security. Design, configure, maintain, and troubleshoot enterprise routing and switching infrastructure, including BGP, OSPF, VLANs, VRFs, routing redundancy, and network failover. Engineer and support enterprise network security solutions, including Cisco Firepower, Firepower Management Center (FMC), ASA, firewall policies, access controls, and security hardening. Design, implement, and sustain secure site-to-site and remote-access VPN solutions, including Cisco Secure Client/AnyConnect and connectivity with external partners and vendors. Engineer and maintain hybrid cloud network connectivity integrating on-premises infrastructure with AWS networking services, including VPCs, Direct Connect, Transit Gateway, and load balancing. Support enterprise wireless networking and network access control technologies, including Cisco Identity Services Engine (ISE). Lead technical planning and execution of network infrastructure upgrades, modernization initiatives, lifecycle replacements, and security remediation activities. Evaluate network performance, availability, capacity, and emerging technical requirements; recommend and implement improvements to strengthen service delivery and operational resilience. Lead complex incident investigations and root cause analysis, identifying systemic issues and developing sustainable corrective and preventive solutions. Collaborate with customer representatives, program leadership, cybersecurity teams, vendors, and service providers to assess requirements, develop technical solutions, and influence network engineering decisions. Develop and maintain network architecture documentation, configuration standards, technical implementation plans, and operational procedures. Support incident, problem, change, and service request management processes while ensuring technical accuracy, documentation, and operational accountability. Provide technical mentorship, peer review, and engineering guidance to junior and mid-level network engineers. Identify opportunities for network automation, standardization, and process improvement to increase operational efficiency, reliability, and security.

Bachelor's