Senior Network Architect, Zero-Trust & Secure Infra

i3; Chantilly (VA); On-site; USD 120,000 - 170,000; Full time

Job summary

i3 in Chantilly, VA seeks a Senior Network Engineer to design, implement, and optimize resilient, secure networks across multi-enclave environments supporting mission-critical operations. You will provide strategic leadership in modernization, security architecture, and performance optimization.

The role requires a Bachelor's degree and 8+ years of enterprise networking experience, with hands-on skills in Cisco, Arista, VPNs, virtualization, storage, monitoring, and security.

Qualifications

• Bachelors degree required.
• Minimum 8 years of network engineering experience.
• Design and implement secure enterprise network architectures.
• Lead zero-trust network design and multi-enclave interoperability.
• Experience with secure communications in complex environments.
• Strong leadership, communication, and documentation.

Responsibilities

• Design and implement enterprise network architectures that support secure, mission-critical operations.
• Lead zero-trust network design initiatives and cross-enclave interoperability solutions.
• Optimize network performance, reliability, and security across complex, multi-enclave environments.
• Establish and enforce network security architecture standards and governance processes.
• Drive network modernization efforts aligned with enterprise strategy and zero-trust principles.
• Ensure secure communications and connectivity across classified and highly regulated environments.
• Provide technical leadership for network infrastructure planning and implementation.
• Partner with security, architecture, and operations teams to maintain resilient network systems.

Skills

Cisco Switching & Routing

Firewalls & IPSEC/DMVPN/SD-WAN

Arista Switching

VPNs & Tunneling (GRE/IPSEC/OpenVPN/Wg

VMware ESXi/vCenter/VSAN

Proxmox & Ceph

Nutanix Prism Central

QNAP/Synology/NetApp

Samba/SSH/NFS

Nessus vulnerability scanning

Splunk familiarity

Linux/Windows system administration

IPA/OpenLDAP/Keycloak

Docker/Kubernetes/GitLab/Jupyter

Education

Bachelor's degree

Master's degree in IT/Networking/Cybersecurity

Tools

VMware vSphere/ESXi

Proxmox

Nutanix Prism Central

Nessus

Splunk

Nginx

Confluence/Jira

Docker

Kubernetes

GitLab

Jupyter

Job description

i3 in Chantilly, VA seeks a Senior Network Engineer to design, implement, and optimize resilient, secure networks across multi-enclave environments supporting mission-critical operations. You will provide strategic leadership in modernization, security architecture, and performance optimization.

The role requires a Bachelor's degree and 8+ years of enterprise networking experience, with hands-on skills in Cisco, Arista, VPNs, virtualization, storage, monitoring, and security.