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: IT Infrastructure and Operations Job Qualifications: Skills: Enterprise Network, Network Architecture, Network Engineering, Network InfrastructuresCertifications: NoneExperience: 8 + years of related experienceUS 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 infrastructure that supports enterprise applications, services, and users across hybrid environments. The ideal candidate brings deep experience in enterprise 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. 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 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 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 with enterprise routing and switching Deep understanding of networking protocols such as TCP/IP, DNS, HTTP/HTTPS, and VPN technologies Experience operating and troubleshooting dynamic routing protocols such as BGP and OSPF Experience configuring and maintaining enterprise firewall platforms, VPN connectivity, and network security control Experience managing DNS infrastructure, including monitoring, security, and integration with enterprise directory services Experience supporting enterprise wireless and device authentication environment Experience working within large enterprise or service provider environments Familiarity with network monitoring and diagnostic tools Ability to collaborate effectively across infrastructure, cloud, and security engineering teams Preferred skills not required: Experience with leading enterprise networking platforms such as JUNOS-based systems, Silverpeak SDWAN, BlueCat and Palo Alto Firewalls Experience with SASE Experience supporting networking in hybrid cloud environments Familiarity with network automation, scripting, or infrastructure automation frameworks Experience contributing to network 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. Scheduled Weekly Hours: 40 Travel Required: Less than 10% Telecommuting Options: Remote Work Location: USA VA Falls Church Additional Work Locations: USA VA Herndon Total Rewards at GDIT: 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 consulting, technology 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 capabilities in digital modernization, AI/ML, Cloud, Cyber and application development. Together with our clients, 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 atgdit.com/tc. Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans Apply To This Job