Network Engineer Principal

Job Description:Type of Requisition:RegularClearance Level Must Currently Possess:NoneClearance Level Must Be Able To Obtain:NonePublic Trust/Other Required:NoneJob Family:Cyber and IT Risk ManagementSkills:Job Qualifications:IT Network Security, Networking, Network Security Engineering, Vulnerability Management, Zscaler ArchitectureCertifications:NoneExperience:10 + years of related experienceUS Citizenship Required:NoJob Description:We are seeking a Senior 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.This position is expected to be hybrid within the DMV region out of Herndon or Falls Church, Virginia.MEANINGFUL WORK AND PERSONAL IMPACTOperate and enhance secure internet access servicesManage enterprise web traffic filtering and cloud-based secure web access platformsImplement and maintain URL filtering, SSL inspection, and threat protection policiesTroubleshoot user connectivity issues related to secure web access and policy enforcementSupport secure connectivity and network accessConfigure and maintain secure network tunnels using technologies such as GRE and IPSecSupport enterprise implementations of Zero Trust security models and access controlsImplement policies that enable secure access to modern business applications, including AI-enabled services, while maintaining organizational security postureDeliver Secure Browser And Remote Access CapabilitiesConfigure and troubleshoot cloud browser isolation solutionsSupport secure access platforms that provide controlled access to internet and SaaS applicationsSupport enterprise authentication and application deliveryMaintain network services that support authentication mechanisms such as SAML and KerberosWork with application delivery and load balancing technologies, including global traffic distribution, SSL offloading/bridging, URI redirection, and HTTP profile configurationMaintain critical network infrastructure servicesManage DNS infrastructure, including record creation, monitoring, and troubleshootingImplement DNS security and protection capabilitiesSupport DNS integration with directory services and DHCP systemsCollaborate across engineering teamsWork closely with security, identity, and cloud engineering teams to implement network controls that support enterprise security initiativesMentor junior engineers and contribute to operational best practices and documentationParticipate in troubleshooting, change management, and incident response activities across network infrastructureWhat You’ll Need To SucceedBring 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 environmentsTechnical skills:Strong experience operating internet edge and secure access networking platforms; SASE toolsExperience implementing and troubleshooting secure web access controls, including URL filtering and SSL inspectionHands-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 infrastructuresExperience supporting application delivery and load balancing technologies, (F5 and/or CloudFlare) including authentication integration and SSL handlingStrong troubleshooting skills across network, authentication, and application access layersExperience managing DNS infrastructure, including security, monitoring, and integration with directory servicesStrong understanding of networking fundamentals including routing, switching, encryption, and identity-aware access controlsRole requirements: Ability to collaborate effectively across network, security, and identity teams in a large enterprise environmentPreferred skills not required:Industry certifications in networking, cloud networking, or security disciplinesExperience supporting networking within large-scale cloud SaaS (Zscaler/CloudFlare) platformsExperience supporting secure access solutions within enterprise-scale organizationsApplication delivery and load balancing technologies such as F5 and CloudFlareDNS infrastructure experience with BlueCat and CloudFlareLocation: This is a hybrid position that requires working onsite at our our GDIT facility in Falls Church, VA or Herndon, VA. Must be comfortable working onsite (3) days minimum.GDIT IS YOUR PLACEAt 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 opportunitiesSupport: An internal mobility team focused on helping you achieve your career goalsRewards: Comprehensive benefits and wellness packages, 401K with company match, and competitive pay and paid time offCommunity: Award-winning culture of innovation and a military-friendly workplaceOWN YOUR OPPORTUNITYExplore 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 - $130,525. 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:40Travel Required:10-25%Telecommuting Options:HybridWork Location:USA VA Falls ChurchAdditional Work Locations:USA VA HerndonTotal 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 30,000 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