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 support a large, complex environment, focusing on implementing and enhancing critical network capabilities for secure access to applications and services.

Responsibilities:

• Operate and enhance secure internet access services
• Manage enterprise web traffic filtering and cloud-based secure web access platforms
• Implement and maintain URL filtering, SSL inspection, and threat protection policies
• Troubleshoot user connectivity issues related to secure web access and policy enforcement
• Support secure connectivity and network access
• Configure and maintain secure network tunnels using technologies such as GRE and IPSec
• Support enterprise implementations of Zero Trust security models and access controls
• Implement policies that enable secure access to modern business applications, including AI-enabled services, while maintaining organizational security posture
• Deliver Secure Browser And Remote Access Capabilities
• Configure and troubleshoot cloud browser isolation solutions
• Support secure access platforms that provide controlled access to internet and SaaS applications
• Support enterprise authentication and application delivery
• Maintain network services that support authentication mechanisms such as SAML and Kerberos
• Work with application delivery and load balancing technologies, including global traffic distribution, SSL offloading/bridging, URI redirection, and HTTP profile configuration
• Maintain critical network infrastructure services
• Manage DNS infrastructure, including record creation, monitoring, and troubleshooting
• Implement DNS security and protection capabilities
• Support DNS integration with directory services and DHCP systems
• Collaborate across engineering teams
• Work closely with security, identity, and cloud engineering teams to implement network controls that support enterprise security initiatives
• Mentor junior engineers and contribute to operational best practices and documentation
• Participate in troubleshooting, change management, and incident response activities across network infrastructure

Requirements:

• 10 + years of related experience
• Education: Bachelors degree. In lieu of degree, 14+ years of experience supporting enterprise networking environments required
• Strong experience operating internet edge and secure access networking platforms; SASE tools
• Experience implementing and troubleshooting secure web access controls, including URL filtering and SSL inspection
• Hands-on experience configuring secure tunnels and encrypted network connectivity (e.g., GRE, IPSec)
• Experience working in environments implementing SASE tools Zero Trust security principles
• Familiarity with cloud-connected networking environments, particularly in large hybrid infrastructures
• Experience supporting application delivery and load balancing technologies, (F5 and/or CloudFlare) including authentication integration and SSL handling
• Strong troubleshooting skills across network, authentication, and application access layers
• Experience managing DNS infrastructure, including security, monitoring, and integration with directory services
• Strong understanding of networking fundamentals including routing, switching, encryption, and identity-aware access controls
• Ability to collaborate effectively across network, security, and identity teams in a large enterprise environment
• Industry certifications in networking, cloud networking, or security disciplines
• Experience supporting networking within large-scale cloud SaaS (Zscaler/CloudFlare) platforms
• Experience supporting secure access solutions within enterprise-scale organizations
• Application delivery and load balancing technologies such as F5 and CloudFlare
• DNS infrastructure experience with BlueCat and CloudFlare