Network Engineer (Senior)

Location: Chantilly, VA
Security Clearance: Active TS or higher [Required]
Job Type: Full-Time
Target Salary Range*: $100,000 - $146,000

*This represents the potential salary range for this position depending on education level, years of experience and/or certifications in addition to other position specific requirements which may impact salary

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.

• 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.

• 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.

• 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.

• 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.

• 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.

• Support storage technologies including QNAP, Synology, TrueNAS, and NetApp.
• Support file transport protocols including Samba, SSH, SFTP, and NFS.
• Support network-based and host-based monitoring and collection.
• Configure internal and external alerting, including SMTP-based notifications.
• Support active vulnerability scanning using technologies such as Nessus.
• Support Splunk for SIEM and monitoring functions.

• Support Linux operating systems, including Rocky Linux, Red Hat, Amazon Linux, and Ubuntu.
• Support Windows and macOS environments.
• Support identity and access management technologies including IPA/FreeIPA, LDAP/OpenLDAP, Keycloak, and Linux SSSD host-based access control.
• Support applications and platforms including Splunk, Nginx, Confluence, Jira, Docker, Kubernetes, GitLab, and Jupyter.

• Bachelor’s degree. [Required]

• Minimum 8 years of relevant experience. [Required]
• Extensive experience designing and supporting enterprise network environments. [Required]
• Experience implementing zero-trust architectures and secure communications solutions. [Required]
• Experience supporting mission-critical, highly secure, or regulated environments. [Required]

• Strong expertise in routing, switching, firewalls, VPNs, network security, and access-control technologies. [Required]
• Advanced troubleshooting and network performance analysis skills. [Required]
• Strong leadership, communication, and technical documentation skills. [Required]

• 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, 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.