Network Engineer

Leidos LLC; Plyers Mill Estates (MD); On-site; USD 116,000 - 210,000; Full time

Job summary

Leidos is seeking a Senior Network Engineer to join our team at the National Digital Exploitation & OSINT Center (NDOC) in Bethesda. You will design, implement, and sustain highly available, secure data center networks, including spine-leaf topologies and fabric networks, while coordinating with IT, cybersecurity, and applications teams.

You will lead troubleshooting, optimize connectivity, and oversee ITSM tooling like ServiceNow, SolarWinds, and NetBox.

Qualifications

• 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 ServiceNow, SolarWinds, and NetBox.
• 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 Computing Environment (CE) certification.

Responsibilities

• Provide senior-level technical expertise in design, implementation, and sustainment of data center and enterprise networks.
• Lead planning and integration of LAN/WAN infrastructure across on-premises, cloud, and mission networks.
• Configure, optimize, and troubleshoot Cisco ACI, routers, switches, firewalls, and load balancers.
• Monitor network health and performance using ITSM tools and data center metrics.
• Provide technical leadership and incident resolution for complex network issues.
• Develop contingency and continuity plans for network resilience.
• Oversee standards for cabling, patch management, and data center operations.
• Coordinate with IT, Systems Engineering, Cybersecurity, and Applications teams on projects.

Skills

Data center networking

Cisco ACI

Nexus/Catalyst

TCP/IP DNS DHCP

Network monitoring

ITSM tools

Network security

Leadership

Education

Bachelor's degree

Tools

ServiceNow

SolarWinds

NetBox

PRTG

Job description

Leidos is looking for a Senior Network Engineer to join our team in supporting the National Digital Exploitation & OSINT Center (NDOC). The Senior Network Engineer provides senior-level technical expertise in the planning, coordination, implementation, and sustainment 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.

Primary Responsibilities:

Primary Responsibilities:

• Provide senior-level technical expertise in the design, implementation, and sustainment of highly available, scalable, and secure data center and enterprise network environments, including spine-leaf topologies, virtualized environments, and fabric networks.
• Support the planning and integration of LAN/WAN infrastructure, ensuring seamless and secure connectivity among on-premises systems, cloud environments, and external mission networks.
• Provide technical leadership in the configuration, optimization, and troubleshooting of Cisco ACI, routers, switches, firewalls, and load balancers in support of mission-critical operations.
• Analyze and optimize network connectivity and performance across servers, storage, hypervisors, and data center interconnects to support network throughput, availability, and reliability requirements.
• Oversee the use of network monitoring and ITSM tools such as ServiceNow, SolarWinds, NetBox, and PRTG to monitor network health, availability, performance, and incident resolution.
• Lead technical troubleshooting and incident resolution for complex network and data center issues, coordinating root cause analysis, corrective actions, and recovery activities as appropriate.
• Develop and maintain contingency and continuity plans and procedures to support network resilience and minimize service disruptions during outages, maintenance events, and other operational activities.
• Provide technical oversight of network infrastructure standards and practices, including cabling, patch management, structured wiring, equipment configuration, documentation, and data center operations.
• Analyze network segmentation, performance, capacity, and latency requirements and recommend optimization strategies across physical and virtual environments.
• Coordinate with IT, Systems Engineering, Cybersecurity, and Application teams to support cross-functional projects and ensure network implementations align with established security, technical, and mission requirements.
• Provide technical oversight of ServiceNow ITSM activities, including work assignment, incident and change tracking, documentation, escalation, and resolution in accordance with established procedures and SLAs.
• Prepare and present technical status reports, incident summaries, performance metrics, and recommendations to program leadership and government stakeholders.
• Provide technical support and leadership for network modernization and data center consolidation initiatives, helping to develop implementation approaches and ensuring assigned activities meet established technical, budgetary, and schedule requirements.
• Evaluate emerging network technologies and provide recommendations regarding solutions that may improve data center efficiency, scalability, availability, and cybersecurity posture.
• Provide technical guidance, mentoring, and work direction to network engineers and technicians, assisting with complex technical issues and supporting professional development.
• Assist leadership with resource planning, work schedules, and personnel coverage to support operational and mission requirements.
• May support the evaluation of resumes and technical qualifications for network engineering vacancies and participate in candidate interviews as a technical subject matter expert.
• May provide input to leadership regarding the performance and development of assigned personnel, including periodic feedback and assessments against established employee goals and corporate guidelines.
• May review and approve timesheets for assigned personnel in accordance with corporate standards and established procedures.
• Provide after-hours or on-call technical support as required for critical outages, service interruptions, and other mission-impacting events.

Basic Qualifications:

• 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 ServiceNow, SolarWinds, and NetBox.
• 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 Computing Environment (CE) certification.

Clearance:

Due to the nature of the government contracts we support, US Citizenship is required. TS/SCI with Poly required for Position or TS/SCI and willingness to get a poly.

Education:

Requires a Bachelor’s degree and 12+ years of relevant experience. Additional years of relevant experience may be considered in lieu of a degree.

Preferred Qualifications:

• Active Cisco Certified Network Associate (CCNA) certification
• CCNP or CCIE certification
• #NMECDTP-Leidos

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo - because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 - and moving faster than anyone else dares.

Leidos is an industry and technology leader serving government and commercial customers with smarter, more efficient digital and mission innovations. Headquartered in Reston, Virginia, with 47,000 global employees, Leidos reported annual revenues of approximately $17.2 billion for the fiscal year ended January 2, 2026. For more information, visit www.Leidos.com.

Original Posting:

September 14, 2026

For U.S. Positions:

While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:

Pay Range $116,350.00 - $210,325.00 The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.

Pay and Benefits:

Pay and benefits are fundamental to any career decision. That's why we craft compensation packages that reflect the importance of the work we do for our customers. Employment benefits include competitive compensation, Health and Wellness programs, Income Protection, Paid Leave and Retirement. More details are available here.

Securing Your Data:

Leidos will never ask you to provide payment-related information at any part of the employment application process. And Leidos will communicate with you only through emails that are sent from a Leidos.com email address. If you receive an email purporting to be from Leidos that asks for payment-related information or any other personal information, please report the email to [e-mail].

Commitment and Diversity:

All qualified applicants will receive consideration for employment without regard to sex, race, ethnicity, age, national origin, citizenship, religion, physical or mental disability, medical condition, genetic information, pregnancy, family structure, marital status, ancestry, domestic partner status, sexual orientation, gender identity or expression, veteran or military status, or any other basis prohibited by law. Leidos will also consider for employment qualified applicants with criminal histories consistent with relevant laws.