Enterprise Network Engineer - TS/SCI w/Poly
About The Position
GDIT is seeking an experienced Enterprise Network Engineer to engineer, operate, troubleshoot, and maintain three distinct enterprise network environments with different security boundaries, configurations, and operational requirements. The role focuses on understanding how complete networks function and how their components interact, rather than configuring individual devices in isolation. Technologies include Juniper switches, Palo Alto firewalls, and F5 load balancers. The engineer will trace network paths, analyze traffic flows and routing decisions, diagnose end-to-end connectivity issues, and assess the potential impact of changes before implementation. The position works with systems, security, virtualization, cloud, application, and other engineering teams to maintain secure, reliable, and high-performing enterprise connectivity. The role is onsite in Annapolis Junction, Maryland, and requires current TS/SCI with Polygraph clearance and U.S. citizenship.
Requirements
- Bachelor of Arts or Bachelor of Science degree.
- At least 8 years of related experience.
- Experience engineering, administering, or supporting enterprise network environments.
- Strong knowledge of enterprise routing, switching, and network troubleshooting.
- Hands-on experience with Juniper network switches.
- Experience configuring and troubleshooting Palo Alto firewalls.
- Experience supporting and maintaining F5 load balancers.
- Knowledge of VLANs, IP addressing, subnetting, routing protocols, segmentation, TCP/IP, and network traffic flows.
- Ability to troubleshoot connectivity across the complete network path and identify configuration-related issues.
- Understanding of security boundaries and the effect of network policies on enterprise communications.
- Ability to independently analyze complex problems, determine root causes, develop solutions, and safely implement changes.
- Strong communication and cross-functional collaboration skills.
- Must currently possess TS/SCI with Polygraph clearance.
- U.S. citizenship required.
- Must be 8570 compliant with a Security+ certification.
Nice To Haves
- Experience with Cisco routing and switching.
- Experience supporting isolated or segmented enterprise networks.
- Advanced Juniper routing and switching knowledge.
- Palo Alto security policy administration and troubleshooting.
- Experience with F5 BIG-IP, LTM, GTM/DNS, or related application-delivery technologies.
- Experience with packet capture, protocol analysis, network monitoring, and traffic-analysis tools.
- Network automation or configuration-management experience.
- PowerShell, Python, or similar scripting skills.
- Microsoft Azure or AWS networking experience.
- Experience supporting large-scale, distributed, or mission-critical networks.
Responsibilities
- Engineer, configure, operate, and improve infrastructure across three separate enterprise network environments.
- Design, implement, and troubleshoot routing and switching configurations.
- Maintain Palo Alto firewall configurations, security rules, network segmentation, and controlled communications between authorized systems.
- Configure and support F5 load-balancing services for application availability, traffic distribution, and performance.
- Trace network paths, analyze traffic flows and routing decisions, and resolve end-to-end connectivity issues.
- Evaluate how routing, switching, firewalls, load balancers, security controls, and connected infrastructure interact.
- Maintain configurations appropriate to each environment’s architecture, security boundary, and operational requirements.
- Assess the potential impact of proposed changes before implementation.
- Identify recurring issues and recommend improvements to reliability, performance, security, and operational efficiency.
- Collaborate with systems, security, virtualization, cloud, application, and other engineering teams.
- Analyze complex problems, determine root causes, develop solutions, and implement changes safely.
Benefits
- Comprehensive benefits and wellness packages.
- 401(k) with company match.
- Competitive pay and paid time off.
- Medical plan options, including options with Health Savings Accounts.
- Dental plan options.
- Vision plan.
- Full flex work weeks where possible.
- Paid time off plans including vacation, sick and personal time, holidays, paid parental, military, bereavement, and jury duty leave.
- Short- and long-term disability benefits.
- Life insurance and other insurance offerings, including accidental death and dismemberment, personal accident, critical illness, and business travel and accident insurance.
- Growth and learning opportunities through an AI-powered career tool.
- Internal mobility team focused on career goals.
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What This Job Offers
Job Type
Full-time
Career Level
Senior
