Leidos has a new and exciting opportunity for a Sr. Network Engineer in our National Security Sectors (NSS) Cyber &amp; Analytics Business Area (CABA). Our talented team is at the forefront in Security Engineering, Computer Network Operations (CNO), Mission Software, Analytical Methods and Modeling, Signals Intelligence (SIGINT), and Cryptographic Key Management. At Leidos, we offer competitive benefits, including Paid Time Off, 11 paid Holidays, 401K with a 6% company match and immediate vesting, Flexible Schedules, Discounted Stock Purchase Plans, Technical Upskilling, Education and Training Support, Parental Paid Leave, and much more.  Join us and make a difference in National Security!   Job Description: Pending position funding, Leidos will be seeking a Sr. Network  Engineer to work in our Columbia, MD office.  This is an exciting opportunity to use your experience helping several Contracts setup networking architectures, and manage a unique set of programs in various data centers across the country.  This job will require coordination with various clients to design and plan network communication systems.  This job will entail site surveys of data center locations and prepare write-ups for each job surveyed.Responsibilities Include: <ul><li>Design and develop network architectures, including specifications, detailed drawings, and Bill of Materials (BOM).</li><li>Conduct cost/benefit analyses and provide detailed recommendations for hardware, data center selection, implementation techniques, and tools to meet present and future capacity needs.</li><li>Test and monitor network hardware operations, ensuring proper configuration settings and accountability for performance.</li><li>Plan and implement network enhancements and upgrades, maintaining technical expertise across routers, multiplexers, firewalls, hubs, bridges, gateways, and other interconnection technologies.</li><li>Implement and sustain routing and switching solutions in data center/telecommunications environments, including IP routing, policy-based routing, VLAN configuration, access-control lists, secure virtual tunneling, and IP SLA requirements.</li><li>Deploy SNMP-based monitoring and reporting tools, such as ZENOSS or SolarWinds, and integrate network systems equipment in rack-mounted configurations.</li><li>Support telecom services and infrastructure, including vendor circuit orders, service implementation changes, IP subnetting and allocation, troubleshooting IP and telecom service interruptions, and fulfilling call-in and minimal CONUS travel requirements.</li></ul>Basic Qualifications:  <ul><li>Bachelors of Science in related discipline such as Information Technology or Information Systems with an emphasis in Internetworking and a minimum of 15 years.   Masters degree and 10 yrs excepted.</li><li>10+ years’ experience with Cisco routers to include Integrated Service Routers (ISR). Understanding and implementation of static routing, policy-based routing, access-control lists (ACL), IP encryption tunneling protocols such as IPSEC and Virtual Tunnel Interface (VTI). Also include an understanding and implementation of IP SLA and route failure scenarios.</li><li>10+ years of experience with Cisco Catalyst series switches to include configuration and implementation of base IP routing, VLAN implementation, secure access protocols such as SSH and ACL configuration.</li><li>8+ years’ experience in design and implementation requirements to provide customer solutions as needed for network. This includes diagram drafting, creating a rack elevation model, requesting vendor product quotes and cost analysis. Order equipment, burn in testing and fielding rack solution where required.</li><li>Experience in the implementation and sustainment of common SNMP monitoring platforms such as ZENOSS with an emphasis on node management and configuration of SNMPv3 accounting on all routers and switches as well as software platform. Must be able to understand metrics monitoring and reporting as well as trending of bandwidth utilization for planning of appropriate bandwidth scaling of all communications circuits in use.</li><li>Must be able to work IP and Telecom vendor related issues such as circuit order implementation from initial orders to tracking of completion. Circuit related outages or interruptions and coordinating remote support for service restoration.</li><li>Clearance Required:  Must have an active TS/SCI with Polygraph.</li></ul>Preferred Qualifications:  <ul><li>Expertise in Network Devices: Routers, switches (including Catalyst Edge Router platforms), firewalls, from various vendors (e.g., Cisco, Arista)</li><li>Strong Experience with Cisco IOS XE Software: As the operating system for the Catalyst 8300 series, including its features for SD-WAN, security, and automation.</li><li>Deep Understanding of Networking Protocols and Technologies: Including TCP/IP, BGP, OSPF, EIGRP, MPLS, VPNs.</li><li>Deep WAN Engineering Expertise: Understanding of WAN design principles, including redundancy, scalability, security, and cost optimization. Ability to identify, deploy, and manage complex networking systems</li><li>Familiarity with Network Monitoring and Management Tools: Such as SolarWinds, Intermapper, Splunk, Prometheus.</li></ul>At Leidos, the opportunities are boundless. We challenge our staff with interesting assignments that allow them to thrive professionally and personally. For us, helping you grow your career is good business. We look forward to learning more about you – apply todayconmdCome break things (in a good way). Then build them smarter.Were the tech company everyone calls when things get weird. We don’t wear capes (they’re a safety hazard), but we do solve high-stakes problems with code, caffeine, and a healthy disregard for “how it’s always been done.”<h2></h2><h2></h2><h2>Original Posting:</h2>August 14, 2025For 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.<h2>Pay Range:</h2>Pay Range $134,550.00 - $243,225.00The 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.

Leidos Holdings

Network Systems Engineer

Leidos Holdings