Network Engineer - Top Secret Clearance Required

i3 • Chantilly, VA

11h

About The Position

The Senior Network Engineer leads the design, implementation, and optimization of resilient, secure network infrastructures supporting mission-critical operations. The role provides strategic and technical leadership in network modernization, security architecture, and performance optimization, ensuring reliable communications across complex, multi-enclave environments. It includes technical leadership for infrastructure planning and implementation and collaboration with security, architecture, and operations teams to maintain resilient network systems.

The position requires a bachelor's degree and at least eight years of experience. It calls for extensive enterprise networking expertise, including routing, switching, firewalls, VPNs, network security, access control, zero-trust architectures, and secure communications. The role supports mission-critical, highly secure, or regulated environments and requires advanced troubleshooting, performance analysis, leadership, communication, and technical documentation skills.

Technical areas include Cisco and Arista networking; VPNs and tunneling; VMware, Proxmox, and Nutanix virtualization and hyper-converged infrastructure; large-data storage; monitoring, alerting, vulnerability scanning, and SIEM; Linux, Windows, and macOS administration; identity and access management; and applications such as Splunk, Nginx, Confluence, Jira, Docker, Kubernetes, GitLab, and Jupyter. A top-secret clearance is required.

Requirements

• Bachelor's degree.
• Minimum eight years of experience.
• Top Secret clearance required.
• Extensive experience designing and supporting enterprise network environments.
• Strong expertise in routing, switching, firewalls, VPNs, network security, and access control technologies.
• Experience implementing zero-trust architectures and secure communications solutions.
• Advanced troubleshooting and network performance analysis skills.
• Experience supporting mission-critical, highly secure, or regulated environments.
• Strong leadership, communication, and technical documentation skills.
• Technical skills covering Cisco switching, routing, firewalling, and site-to-site VPN functionality such as IPsec, DMVPN, and SD-WAN; Arista switching; tunneling and VPN technologies; virtual distributed switching; VMware/Broadcom, Proxmox, and Nutanix platforms; large-data storage technologies and file transport protocols; monitoring, alerting, vulnerability scanning, and SIEM; Linux, Windows, and macOS; identity and access management; and the listed applications.

Nice To Haves

• Master's degree in Information Technology, Network Engineering, Cybersecurity, or a related field.
• Experience supporting federal, defense, intelligence, or classified network environments.
• Expertise with multi-enclave or cross-domain network architectures.
• Experience with cloud networking, software-defined networking (SDN), and hybrid cloud environments.
• Knowledge of security accreditation processes and compliance frameworks.
• Relevant certifications such as CCNP, CCIE, CISSP, JNCIP, JNCIE, AWS Advanced Networking, or equivalent.

Responsibilities

• Design and implement enterprise network architectures for secure, mission-critical operations.
• Lead zero-trust network design initiatives and cross-enclave interoperability solutions.
• Optimize network performance, reliability, and security in complex, multi-enclave environments.
• Establish and enforce network security architecture standards and governance processes.
• Drive network modernization 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.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior