Senior Network Engineer — Zero-Trust & Multi-Enclave Design

i3 Consulting; Chantilly (VA); On-site; USD 120,000 - 180,000; Full time

Job summary

i3 Consulting seeks a Senior Network Engineer to lead design, implementation, and optimization of secure, resilient networks for mission-critical operations. The role drives zero-trust modernization, cross-enclave interoperability, and end-to-end network governance.

Responsibilities include guiding architecture, ensuring secure communications, and coordinating with security, architecture, and operations teams in highly regulated environments.

Qualifications

• Extensive experience designing and supporting enterprise network environments.
• Expertise in routing, switching, firewalls, VPNs, and network security.
• Experience implementing zero-trust architectures and secure communications.
• Strong troubleshooting, performance analysis, and documentation skills.

Responsibilities

• Design and implement enterprise network architectures for secure, mission-critical ops.
• Lead zero-trust design initiatives and cross-enclave interoperability solutions.
• Optimize performance, reliability, and security across complex environments.
• Establish and enforce network security standards and governance.
• Drive modernization aligned with enterprise strategy and zero-trust principles.
• Ensure secure communications across classified and regulated environments.
• Provide technical leadership for network planning and implementation.
• Collaborate with security, architecture, and operations teams to maintain resilience.

Skills

Networking

Virtualization

Security

Network design

Leadership

Education

Bachelor's degree

Master's degree (preferred)

Tools

Cisco

Arista

VPNs & Tunneling

VMware

Proxmox

Nutanix

Nessus

Splunk

Nginx

Jira

Confluence

Docker

Kubernetes

Job description

i3 Consulting seeks a Senior Network Engineer to lead design, implementation, and optimization of secure, resilient networks for mission-critical operations. The role drives zero-trust modernization, cross-enclave interoperability, and end-to-end network governance.

Responsibilities include guiding architecture, ensuring secure communications, and coordinating with security, architecture, and operations teams in highly regulated environments.