Network Engineer Principal

About the role

We are seeking a Network Engineer Principal to join our enterprise infrastructure team supporting a large, complex environment spanning cloud and enterprise network 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
• Configure and maintain secure network tunnels using technologies such as GRE and IPSec
• 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
• Support secure access platforms that provide controlled access to internet and SaaS applications
• 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

The ideal candidate brings deep experience in enterprise networking, secure internet access, authentication, and cloud-connected SaaS infrastructure.

Qualifications

• Education: Bachelors degree. In lieu of degree, 14+ years of experience supporting enterprise networking environments required.
• Experience: 10+ years of experience supporting enterprise networking environments
• Technical skills: 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
• Understanding of networking fundamentals including routing, switching, encryption, and identity-aware access controls
• Zscaler and or cloudflare experience is required

Skills

• Ability to collaborate effectively across network, security, and identity teams in a large enterprise environment
• US Person

Benefits

GDIT offers comprehensive benefits and wellness packages, including a 401(k) plan offering the ability to contribute both pre and post-tax dollars up to the IRS annual limits and receive a company match. To encourage work/life balance, GDIT offers employees full flex work weeks where possible and a variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave. To ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available.