Network Engineer Principal

We are seeking aNetwork Engineer Principalto 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 infrastructure that supports enterprise applications, services, and users across hybrid environments.

The ideal candidate brings deep experience inenterprise routing, switching, network security, and core infrastructure services. This role focuses on implementing and operating existing network architecture while identifying opportunities to improve performance, reliability, and operational efficiency across the network environment. You will join a collaborative engineering team responsible for maintaining large-scale enterprise networking platforms, including routing, switching, security infrastructure, and foundational network services used by thousands of users and applications.

This position is expected to behybrid within the DMV region out of our Herndon or Falls Church Virginia locations.

MEANINGFUL WORK AND PERSONAL IMPACT:

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

WHAT YOU’LL NEED TO SUCCEED

The Network Engineer Principal must have:

• Education: High School diploma required
• Experience: 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 withenterprise routing and switching
• Deep understanding of networking protocols such asTCP/IP, DNS, HTTP/HTTPS, and VPN technologies
• Experience operating and troubleshootingdynamic routing protocols such as BGP and OSPF
• Experience configuring and maintainingenterprise firewall platforms, VPN connectivity, and network security control
• Experience managingDNS infrastructure, including monitoring, security, and integration with enterprise directory services
• Experience supportingenterprise wireless and device authentication environment
• Experience working withinlarge enterprise or service provider environments
• Familiarity withnetwork monitoring and diagnostic tools
• Ability to collaborate effectively across infrastructure, cloud, and security engineering teams
• Location: hybrid schedule in Falls Church or Herndon, VA office location

Preferred skills not required:

• Experience with leading enterprise networking platforms such asJUNOS-based systems, Silverpeak SDWAN, BlueCat and Palo Alto Firewalls
• Experience with SASE
• Experience supporting networking inhybrid cloud environments
• Familiarity withnetwork automation, scripting, or infrastructure automation frameworks
• Experience contributing tonetwork design documentation and operational standards
• Industry certifications in networking, cloud networking, or security disciplines

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 an enterprise IT career at GDIT and you’ll find endless opportunities to grow alongside colleagues who share your desire to drive operations forward.

The likely salary range for this position is $110,500 - $149,500. 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.
View information about benefits and our total rewards program.

We are GDIT. A global technology and professional services company that delivers technology and mission services to every major agency across the U.S. government, defense and intelligence community. Our 30,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across over 50 countries worldwide, offering leading capabilities in digital modernization, AI/ML, cloud, cyber and application development. Together with our customers, we strive to create a safer, smarter world by harnessing the power of deep expertise and advanced technology.

Join our Talent Community to stay up to date on our career opportunities and events at gdit.com/tc.

Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans