Network Engineer (Senior)

Location: Chantilly, VA; Security Clearance: Active TS or higher [Required]; Job Type: Full-Time

About the role

The Network Engineer (Senior) leads the design, implementation, modernization, and optimization of resilient, secure network infrastructure supporting mission-critical operations. This role provides strategic and technical leadership in network architecture, zero-trust implementation, performance optimization, and secure communications across complex, multi-enclave environments. The Network Engineer (Senior) also supports enterprise networking, virtualization, storage, monitoring, identity and access management, and related infrastructure technologies while partnering with security, architecture, and operations teams to maintain reliable and secure network services.

Responsibilities

• Network Architecture and Modernization
  • Design and implement enterprise network architectures supporting secure, mission-critical operations.
  • Lead zero-trust network design initiatives and cross-enclave interoperability solutions.
  • Drive network modernization aligned with enterprise strategy and zero-trust principles.
  • Provide technical leadership for network infrastructure planning and implementation.
• Network Performance and Resilience
  • Optimize network performance, reliability, and security across complex, multi-enclave environments.
  • Partner with security, architecture, and operations teams to maintain resilient network systems.
  • Troubleshoot complex network performance and connectivity issues.
  • Support reliable communications across secure and highly regulated environments.
• Security Architecture and Governance
  • Establish and enforce network security architecture standards and governance processes.
  • Ensure secure communications and connectivity across classified and highly regulated environments.
  • Support vulnerability monitoring, alerting, and security assessment activities.
  • Apply secure access-control and identity-management practices to network infrastructure.
• Enterprise Networking Support
  • Cisco switching, routing, firewalling, and site-to-site connectivity, including IPsec, DMVPN, and SD-WAN.
  • Support Arista switching technologies.
  • Configure and troubleshoot tunneling and VPN technologies, including GRE, IPsec, SSH, SSL, OpenVPN, WireGuard, and specialized multi-tiered applications.
  • Support virtual distributed switching using VMware, Proxmox, and Nutanix.
  • Support client-server VPNs, site-to-site VPNs, and ad hoc vendor or equipment integrations.
• Virtualization and Hyperconverged Infrastructure
  • Support VMware/Broadcom technologies including ESXi/vSphere, vCenter, vSAN, VxRail, cluster management, and licensing.
  • Configure and manage Proxmox hosts and clusters, networking, and Ceph environments.
  • Configure and manage Nutanix hosts and clusters using Prism Central.
  • Support Nutanix NDFS configuration and management.
• Storage, Monitoring, and Platform Support
  • Support storage technologies including QNAP, Synology, TrueNAS, and NetApp.