Network Engineer Principal

Type of Requisition:

Regular

Clearance Level Must Currently Possess:

None

Clearance Level Must Be Able to Obtain:

None

Public Trust/Other Required:

None

Job Family:

Cyber and IT Risk Management

Job Qualifications:

Skills:

IT Network Security, Networking, Network Security Engineering, Vulnerability Management, Zscaler Architecture

Certifications:

None

Experience:

10 + years of related experience

US Citizenship Required:

No

Job Description:

We are seeking a Network Engineer Principal to join our enterprise infrastructure team supporting a large, complex environment spanning cloud and enterprise network services. This is a hands-on engineering role responsible for implementing, operating, and continuously improving critical network capabilities that support secure access to applications, services, and the internet.

The ideal candidate brings deep experience in enterprise networking, secure internet access, authentication, and cloud-connected SaaS infrastructure. This role focuses on maintaining and enhancing existing architecture while partnering closely with security, identity, and cloud engineering teams to ensure reliable and secure connectivity across the organization.

You will join a collaborative engineering team responsible for internet edge services, secure access platforms, and foundational network services used by thousands of users and applications across hybrid cloud environments.

MEANINGFUL WORK AND PERSONAL IMPACT

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

WHAT YOU’LL NEED TO SUCCEED
Bring your cyber expertise and drive for innovation to GDIT. The Network Security Engineer Principal must have:
● 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

• Experienc