Systems/Network Engineer - TS/SCI with Polygraph

Company: GD Information Technology
Location: Herndon
Posted on: April 4, 2026

Job Description:

Type of Requisition: Regular Clearance Level Must Currently Possess: Top Secret SCI Polygraph Clearance Level Must Be Able to Obtain: Top Secret SCI Polygraph Public Trust/Other Required: None Job Family: IT Infrastructure and Operations Job Qualifications: Skills: Cisco Networking Equipment, Network Engineering, Security Architecture Design, Systems Engineering Certifications: None Experience: 5 years of related experience US Citizenship Required: Yes Job Description: Deliver effective solutions to complex problems as a Systems/Network Engineer at GDIT. Here, you’ll tailor cutting-edge solutions to the unique requirements of our clients. With a career in the cyber track, you’ll make the customer's mission your priority and we’ll make your career growth ours. Our ideal Senior Systems/Network Engineer has 5 years' experience architecting and managing network infrastructure, with a focus on network segmentation and automation workflows. We are looking for a forward-thinking engineer to install, configure, and automate network devices and management tools. You will perform advanced administration of Cisco hardware/software while executing modern security practices to isolate workloads and reduce attack surfaces. At GDIT, people are our differentiator. As a Systems/Network Engineer you will help ensure today is safe and tomorrow is smarter. Our work depends on the ideal candidate joining our team to support the customer's mission while defending its networks and information against unauthorized access. HOW A SYSTEMS/NETWORK ENGINEER WILL MAKE AN IMPACT Provide Network Engineering and Operations & Maintenance (O&M) on a proprietary network and related infrastructure devices. Provides and applies advanced engineering to highly complex infrastructures including installing, configuring, testing and maintaining network devices, operating systems, and system management tools. Performs maintenance and provides advanced solutions for continual and highly complex security, backup and redundancy problems. Prepares and maintains documentation for processes and procedures. Maintains current knowledge of rapidly changing technology, on the lookout for new technologies, and works with management to evolve current processes. May coach and review the work of less-experienced professionals. Invents innovative ways to drive operational efficiency. Drives scalability and operability of supported systems/infrastructure. Provides system/equipment/specialized training and technical guidance. WHAT YOU’LL NEED TO SUCCEED: Education: Bachelor of Science in Computer Science, Engineering, or other IT-related discipline, o r the equivalent combination of education, technical certifications or training, or work experience. Required Experience: 5 years Technical skills: Experience with Cisco networking devices (firewalls, routers, switches). Experience with cloud networking concepts and implementation. Familiarity or ability to learn network automation tools and scripting (e.g., Python, Ansible, or Terraform) to streamline configuration and deployment. Experience with network storage concepts and technologies. Well versed with common Virtualization technologies such as VMware. Forward-thinking mindset with the ability to transition manual processes into automated, repeatable workflows. Analyzes complex information and independently takes appropriate actions to resolve problems before they impact production. Continually guides network/system development through the assessment of system engineering management plans and modern integration/test plans. Develops technical documentation, architectures, and network design documentation. Validates the technical integrity of work performed, ensuring configurations meet baseline security and automation standards. Excellent communication skills; shows tact, effective listening skills and follow through. Designs and delivers proactive, future-proof solutions. Monitors usage statistics and logs to proactively recommend future projects to management. Thorough understanding of network concepts, LAN design, network segmentation, and IP addressing Firmware and network operating system patching and upgrades Domain Name Systems (DNS) Network Attached Storage (NAS) VMWare installation and configuration (vSphere / ESXi) Virtual LANs (VLANs) Security clearance: TS/SCI with Polygraph Location: Herndon, VA (customer site) US Citizenship: Required GDIT IS YOUR PLACE: 401K with company match Comprehensive health and wellness packages Internal mobility team dedicated to helping you own your career Professional growth opportunities including paid education and certifications Cutting-edge technology you can learn from Rest and recharge with paid vacation and holidays OpportunityOwned GDITCareers WeAreGDIT JET GDITEnhanced2026 VA_2026Alumni The likely salary range for this position is $136,000 - $184,000. 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. Scheduled Weekly Hours: 40 Travel Required: Less than 10% T elecommuting Options: Onsite Work Location: USA VA Herndon Additional Work Locations: 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 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 at gdit.com/tc . Equal Opportunity Employer / Individuals with Disabilities / Protected Veterans

Keywords: GD Information Technology, Columbia , Systems/Network Engineer - TS/SCI with Polygraph, IT / Software / Systems , Herndon, Maryland