Senior Network Engineer

Public Trust: None

Requisition Type: Regular

Your Impact

Own your opportunity to be at the center of GDIT’s business operations. Make an impact by collaborating across functions to make mission success achievable.

Job Description

We are seeking a Senior Network Engineer 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.

This position does not accept submissions from third‑party agencies or corp‑to‑corp entities. Only direct applicants are eligible for consideration.

Work visa sponsorship will not be provided for this position

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.

This position is expected to be hybrid within the DMV region out of Herndon or Falls Church Virginia . Remote candidates may be considered if a local candidate is not identified.

Operate and improve enterprise network infrastructure

• Install, configure, and support enterprise network equipment including routers, switches, and core network services
• Maintain highly available network infrastructure supporting enterprise and cloud-connected environments
• Continuously improve network reliability, performance, and operational efficiency across large-scale deployments

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
• Diagnose complex network issues across routing, switching, and transport layers

Maintain network security and connectivity

• 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
• Ensure network configurations align with organizational security standards and operational best practices

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

Support enterprise device and wireless authentication

• Troubleshoot wireless authentication and network access for managed devices
• Partner with endpoint management teams to support device identity and authentication workflows

Maintain critical network infrastructure services

• Manage DNS infrastructure, including record creation, monitoring, and troubleshooting
• Implement DNS security and protection capabilities
• Support DNS integration with directory services and DHCP systems

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

Support operational lifecycle management

• Maintain network infrastructure through firmware updates and lifecycle management
• Ensure network equipment remains aligned with current security and operational standards
• Contribute to change management processes and operational readiness activities

What you'll need to succeed

• 10+ years of experience supporting enterprise networking environments
• Education: High School diploma required
• Strong hands-on experience with enterprise routing and switching
• Deep understanding of networking protocols such as TCP/IP, DNS, 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 controls
• Strong troubleshooting skills across routing, switching, and network infrastructure layers
• Experience managing DNS infrastructure , including monitoring, security, and integration with enterprise directory services
• Experience managing DNS infrastructure, including security, monitoring, and integration with 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 but not required

• Experience with leading enterprise networking platforms such as JUNOS-based systems, SD-WAN platforms, Zscaler or next-generation firewall technologies
• 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.

Work Requirements

Years of Experience

10 + years of related experience

* may vary based on technical training, certification(s), or degree

Certification

Travel Required

Less than 10%