Network Engineer

Leidos is seeking a Network Enginee r 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. CLEARANCE: Must be a U.S. Citizen capable of obtaining and maintaining a Public Trust clearance prior to start.

POSITION SUMMARY: This role supports the engineering, operation, maintenance, and modernization of secure, mission-critical enterprise networks across geographically distributed environments. Working alongside the Senior Network Engineer, you’ll implement, configure, maintain, and troubleshoot network solutions across on-premises and hybrid cloud infrastructure.

You’ll collaborate with engineering, cybersecurity, and service desk teams to keep the network available, high-performing, and secure while supporting modernization efforts. You’ll also contribute to documentation, configuration management, and continuous service improvement. A strong foundation in networking and the ability to work across multiple network technologies are essential.

PRIMARY RESPONSIBILITIES: Serve as a Tier 2/3 technical resource for operational and engineering issues affecting mission-critical enterprise infrastructure, escalating complex architectural challenges to the Senior Network Engineer as needed. Assist in the planning, deployment, configuration, and maintenance of network infrastructure solutions across geographically distributed, multi-vendor environments.

Analyze and troubleshoot technical network issues involving multiple systems, implementing approved corrective actions to maintain network reliability, performance, and security. Configure, maintain, and troubleshoot enterprise routing and switching infrastructure, including BGP, OSPF, VLANs, VRFs, routing redundancy, and network failover.

Administer and support enterprise network security solutions, including Cisco Firepower, Firepower Management Center (FMC), ASA, firewall rule updates, access controls, and security hardening. Implement, monitor, and sustain secure site-to-site and remote-access VPN solutions, including Cisco Secure Client/AnyConnect and connectivity with external partners and vendors.

Support and maintain hybrid cloud network connectivity integrating on-premises infrastructure with AWS networking services, including VPCs, Direct Connect, Transit Gateway, and load balancing. Administer enterprise wireless networking and network access control technologies, including Cisco Identity Services Engine (ISE).

Support the execution of network infrastructure upgrades, modernization initiatives, lifecycle replacements, and security remediation activities under the technical guidance of senior engineering staff. Monitor network performance, availability, and capacity; assist in gathering metrics and implementing approved improvements to strengthen service delivery and operational resilience.

Participate in incident investigations and root cause analysis, gathering diagnostic data and executing corrective and preventive tasks. Collaborate with internal engineering teams, cybersecurity teams, vendors, and service providers to troubleshoot issues, coordinate maintenance windows, and implement technical tasks.

Update and maintain network diagrams, configuration records, technical implementation plans, and standard operating procedures (SOPs). Execute incident, problem, change, and service request management tickets while ensuring technical accuracy, thorough documentation, and adherence to SLAs.

Partner with the Senior Network Engineer to test and implement network automation scripts, configuration templates, and process improvements to increase operational efficiency. BASIC QUALIFICATIONS: Bachelor's degree and 4 years’ experience; additional years of experience accepted in lieu of degree.

Hands-on experience designing, implementing, administering, and troubleshooting complex enterprise network infrastructure in production environments. Strong working knowledge and hands-on experience configuring and troubleshooting enterprise routing and switching technologies, including BGP, OSPF, VLANs, VRFs, and network redundancy/failover.

Hands-on experience supporting and administering Cisco and/or Juniper enterprise networking platforms (such as Juniper EX/QFX & Junos OS, and Cisco ISR & IOS devices) in multi-vendor environments.

Hands-on experience configuring, maintaining, and troubleshooting enterprise network security infrastructure, including Cisco ASA, Firepower & FMC, access control policies, and remote-access VPN solutions (Cisco AnyConnect/Secure Client). Demonstrated ability to troubleshoot multi-system network issues, assist with root cause analysis (RCA), and implement approved corrective actions.

Experience executing network infrastructure changes, device upgrades, and security remediation activities in production environments following established change control procedures. Experience updating and maintaining accurate network diagrams, technical documentation, configuration records, and standard operating procedures (SOPs).

Strong interpersonal and communication skills, with experience working alongside senior engineers, cross-functional teams, vendors, and ISPs to resolve operational issues. Familiarity or hands-on experience supporting AWS network infrastructure and hybrid cloud connectivity (e.g., VPCs, Direct Connect, Transit Gateways, load balancers).

Experience administering enterprise wireless infrastructure and Network Access Control (NAC) solutions, such as Cisco Identity Services Engine (ISE). Exposure to virtual computing platforms (e.g., VMware/vSphere) as they relate to network connectivity, as well as Cisco CUCM/UC voice solutions. Active Cisco Certified Network Associate (CCNA) certification.

Ability to obtain a DoD 8140 / IAT Level II baseline certification (e.g., Security+ CE, CySA+, CCNA-Security, GSEC, SSCP). PREFERRED QUALIFICATIONS: Cisco Certified CCNP or Juniper JNCIP-ENT. Experience with Cisco Meraki wireless solutions. Experience with Cisco ISE. Experience with Dell switches and OS10. Experience with ServiceNow.

Security+ CE certification. *** Candidates selected for an interview should note that it will be conducted live via video, with cameras on at all times. As part of our identity verification process, a photo will be taken during the interview to confirm your identity and help protect against fraud. At hire, candidates complete formal identity verification.*** 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. Original Posting: November 13, 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 $73,450.00 - $132,775.00 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.