Sr. Network Engineer

Leidos is looking to fill a Network Engineer position to support the National Digital Exploitation & OSINT Center (NDOC). The Network Engineer supports the planning, coordination, and execution of major computer network initiatives. This is a 100% on‑site position. All work must be performed at the customer site in Bethesda at the Intelligence Community Campus.

• Design, implement, and maintain highly available, scalable, and secure data center and enterprise network architectures, including spine‑leaf topologies, virtualized environments, and fabric networks.
• Plan, integrate, and sustain LAN/WAN infrastructure with seamless connectivity between on‑premises systems, cloud environments, and external mission networks.
• Configure and maintain Cisco ACI, routers, switches, firewalls, and load balancers in support of mission‑critical operations.
• Manage connectivity and performance across servers, storage, hypervisors, and data center interconnects to ensure optimal network throughput and reliability.
• Utilize network monitoring and ITSM tools such as Service Now, Solar Winds, Net Box, and PRTG to track network health, availability, and incident resolution metrics.
• Lead troubleshooting and incident resolution for complex network and data center issues, including root cause analysis and recovery planning.
• Develop and execute contingency and continuity plans to ensure network resilience and minimal downtime during outages or maintenance events.
• Oversee network cabling standards, patch management, and structured wiring practices to support consistent data center operations.
• Implement network segmentation, performance tuning, and latency optimization strategies across physical and virtual environments.
• Coordinate closely with IT, Systems Engineering, Cybersecurity, and Application teams to support cross‑functional projects and ensure network compliance with security and mission requirements.
• Manage and assign work through Service Now ITSM, ensuring incidents and change requests are properly documented and resolved within SLA.
• Provide status reports, incident summaries, and performance metrics to program and executive leadership.
• Lead or support network modernization and data center consolidation initiatives, ensuring projects meet technical, budgetary, and schedule requirements.
• Evaluate and recommend emerging network technologies that improve data center efficiency, scalability, and cybersecurity posture.
• Supervise and mentor network engineers and technicians, providing technical leadership and professional development.
• Assist leadership with planning schedules and ensure proper personnel coverage for support activities.
• Responsible for evaluating resumes for vacancies and serving as a key component during candidate interviews.
• Manage work performance for subordinates, provide periodic feedback, and document performance against employee's goals and corporate guidelines.
• Review and approve timesheets for assigned subordinates in compliance with corporate standards.
• Maintain flexibility to provide after‑hours or on‑call support in the event of critical outages.

• Proven experience designing, implementing, and maintaining data center network architectures with a focus on scalability, redundancy, and security.
• Hands‑on experience with Cisco ACI, Nexus, and Catalyst platforms, including configuration, monitoring, and troubleshooting.
• Strong understanding of TCP/IP, DNS, DHCP, OSPF, BGP, VLANs, HSRP, SNMP, and multicast protocols.
• Proficiency with network monitoring and ITSM tools such as Service Now, Solar Winds, and Net Box.
• In‑depth knowledge of network security principles, including firewall rules, ACLs, VPNs, and secure remote access.
• Familiarity with network asset lifecycle management, capacity planning, and hardware procurement processes.
• Experience leading teams and managing performance under shifting operational priorities.
• Excellent written and verbal communication skills, with the ability to brief senior leadership and government stakeholders.
• Candidate must meet DoD 8140/8570.11‑IAT Level II certification requirements (Security+ CE, CCNA Security, GSEC, or SSCP) with a valid…