Enterprise Network Engineer - TS/SCI w/Poly

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 Routers Switches, Enterprise Network, Routing and Switching Certifications: None Experience: 8 + years of related experience US Citizenship Required: Yes

Job Description:

ENTERPRISE NETWORK ENGINEER

We are seeking an experienced Enterprise Network Engineer who understands how complete networks operate—not simply how to configure individual devices.

You will engineer, operate, troubleshoot, and maintain three distinct enterprise network environments, each with unique security boundaries, configurations, and operational requirements. Using technologies such as Juniper switches, Palo Alto firewalls, and F5 load balancers, you will help ensure secure, reliable, and high-performing connectivity across a complex enterprise.

The ideal candidate understands why configurations work, anticipates the impact of changes, and can troubleshoot the entire network path.

MEANINGFUL WORK AND PERSONAL IMPACT

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.

What Success Looks Like

You will understand how each network environment is designed and how its components work together. When connectivity fails, you can trace the traffic, identify where communication is interrupted, and determine whether the cause involves routing, switching, firewall policy, load balancing, or another infrastructure dependency.

You can explain why configurations exist, make changes with appropriate consideration for security and operational impact, and prevent unintended consequences. Most importantly, you will become a trusted engineer responsible for the infrastructure that keeps the enterprise connected.

Why Our Engineering Team?

Our contract supports a complex enterprise mission spanning 28 IT engineering disciplines. Our engineers collaborate across teams, expand beyond a single specialty, and take ownership of challenging technical problems.

We value critical thinking, independence, continuous learning, exceptional engineering, and a healthy balance between work and family. If you know networking is about more than configuring devices—and want to engineer the infrastructure connecting an enterprise—we want to hear from you.

Understand the Architecture. Trace the Traffic. Secure the Path. Keep the Enterprise Connected.

WHAT YOU’LL NEED TO SUCCEED

Bring your technology expertise and drive for innovation to GDIT. The Enterprise Network Engineer must have:

● Education: Bachelor of Arts/Bachelor of Science

● Experience: 8+ years of related experience

● Technical skills:

• 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.

Preferred Qualifications

• 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.

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