Network Engineer Principal

Req ID: RQ221727

Type of Requisition: Regular

Clearance Level Must Be Able to Obtain: None

Public Trust/Other Required: None

Job Family: Cyber and IT Risk Management

Skills:

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

Experience:

8 + years of related experience

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 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

• 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

• Zscaler and or cloudflare experience is required

● Role requirements: Ability to collaborate effectively across network, security, and identity teams in a large enterprise environment

● US Person

● Preferred skills and abilities:

• 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

GDIT IS YOUR PLACE

At GDIT, the mission is our purpose, and our people are at the center of everything we do.

● Growth: AI-powered career tool that identifies career steps and learning opportunities

● Support: An internal mobility team focused on helping you achieve your career goals

● Rewards: Comprehensive benefits and wellness packages, 401K with company match, and competitive pay and paid time off

● Community: Award-winning culture of innovation and a military-friendly workplace

OWN YOUR OPPORTUNITY

Explore a career in cyber at GDIT and you’ll find endless opportunities to grow alongside colleagues who share your focus on defending and protecting what matters.

The likely salary range for this position is $124,093 - $161,000. This is not, however, a guarantee of compensation or salary. Rather, salary will be set based on experience, geographic location and possibly contractual requirements and could fall outside of this range.

Our benefits package for all US-based employees includes a variety of medical plan options, some with Health Savings Accounts, dental plan options, a vision plan, and 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. We regularly review our Total Rewards package to ensure our offerings are competitive and reflect what our employees have told us they value most.

We are GDIT. A global technology and professional services company that delivers technology solutions and mission services to every major agency across the U.S. government, defense and intelligence community. Our 26,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across 50+ countries worldwide, offering leading mission-ready capabilities in AI, cloud, cyber and software development.

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Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans

Our Identity Verification Process:

As part of the hiring process, we will ask you to complete an identity verification process that leverages advanced biometrics and artificial intelligence to ensure authenticity and protect against identity fraud. You are expected to be on camera during virtual interviews. We reserve the right to take your picture to verify your identity and prevent fraud. By proceeding, you authorize the collection, processing, and use of your biometric data for identity verification and security purposes.