Network Engineer Principal

General Dynamics Information Technology is a global technology and professional services company that delivers consulting, technology, and mission services. They are seeking a Network Engineer Principal to join their enterprise infrastructure team, responsible for implementing and improving critical network infrastructure across hybrid environments.

Responsibilities:

• Operate and improve enterprise network and security infrastructure
• Install, configure, and support enterprise network equipment including routers, switches, and core network services
• Maintain highly available network infrastructure supporting enterprise and cloud-connected environments
• Continuously improve network reliability, performance, and operational efficiency across large-scale deployments
• Configure and support enterprise firewall platforms, including access control policies, VPNs, and secure tunnels
• Maintain secure network connectivity across internal networks, remote sites, and cloud environments
• Maintain network infrastructure through firmware updates and lifecycle management
• Support routing, switching, and core network protocols
• Configure and troubleshoot routing and switching infrastructure across large enterprise environments
• Support dynamic routing protocols such as BGP and OSPF
• Maintain strong operational knowledge of network layers (L1/L2/L3) and how they impact service delivery
• Manage foundational network services
• Manage enterprise DNS infrastructure, including record creation, monitoring, troubleshooting, and lifecycle management
• Support DNS security and protection mechanisms
• Maintain integration between DNS, directory services, and DHCP systems
• Troubleshoot complex network problems
• Provide advanced troubleshooting and resolution for complex network performance or connectivity issues
• Utilize monitoring and diagnostic tools to identify and resolve infrastructure problems
• Participate in incident response, root cause analysis, and operational improvement efforts
• Support enterprise device and wireless authentication
• Troubleshoot wireless authentication and network access for managed devices
• Partner with endpoint management teams to support device identity and authentication workflows
• Collaborate across engineering teams
• Partner with cloud, security, and infrastructure teams to support enterprise networking requirements
• Contribute to network design documentation, operational runbooks, and engineering best practices
• Mentor junior engineers and support knowledge sharing within the engineering organization

Requirements:

• High School diploma required
• 8+ years of related experience with a Bachelor's degree; in lieu of Bachelor's degree, an additional four (4) years of experience is required
• Strong hands-on experience with enterprise routing and switching
• Deep understanding of networking protocols such as TCP/IP, DNS, HTTP/HTTPS, and VPN technologies
• Experience operating and troubleshooting dynamic routing protocols such as BGP and OSPF
• Experience configuring and maintaining enterprise firewall platforms, VPN connectivity, and network security control
• Experience managing DNS infrastructure, including monitoring, security, and integration with enterprise directory services
• Experience supporting enterprise wireless and device authentication environment
• Experience working within large enterprise or service provider environments
• Familiarity with network monitoring and diagnostic tools
• Ability to collaborate effectively across infrastructure, cloud, and security engineering teams
• Experience with leading enterprise networking platforms such as JUNOS-based systems, Silverpeak SDWAN, BlueCat and Palo Alto Firewalls
• Experience with SASE
• Experience supporting networking in hybrid cloud environments
• Familiarity with network automation, scripting, or infrastructure automation frameworks
• Experience contributing to network design documentation and operational standards
• Industry certifications in networking, cloud networking, or security disciplines