Network Engineer

Leidos is seeking a Network Engineer to support Federal Civil customers in the Washington, DC metropolitan area.

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.

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.

Salary Range: $73,450.00 - $132,775.00