Senior Network & Cloud Infrastructure Lead

Strategic Analysis, Inc.; Arlington (VA); On-site; USD 75,000 - 110,000; Full time

Job summary

Strategic Analysis, Inc. is seeking an experienced Network Administrator to support, maintain, and enhance our on-premise and cloud IT infrastructure.

This role ensures high availability, security, compliance, and performance across enterprise systems by managing physical network gear and Microsoft 365 services in hybrid environments. The ideal candidate will troubleshoot complex issues, strengthen security, document solutions, and collaborate with IT teams to support end users and drive

Qualifications

• 3–7+ years of network or systems administration experience.
• Strong understanding of TCP/IP, DNS, DHCP, VLANs, routing, switching, and VPNs.
• Experience with enterprise-grade network hardware (Fortinet, Dell EMC, Sophos).
• Experience with Windows Server administration and Active Directory.

Responsibilities

• Administer and monitor on-premise network infrastructure including switches, routers, firewalls, wireless, and VPNs.
• Configure LAN/WAN, VLANs, routing protocols, and network segmentation.
• Manage Windows Server environments, AD, DNS, DHCP, and Group Policy.
• Support VMware ESXi and Hyper-V, including VM provisioning and performance optimization.
• Administer Microsoft 365 services and maintain hybrid configurations.
• Manage Azure AD/Entra ID identities, MFA, Conditional Access, SSO, and Azure AD Connect.
• Configure Intune/Endpoint Manager for device compliance and Autopilot deployments.
• Implement network and cloud security policies, including DLP and Zero Trust.
• Monitor performance using PRTG or SolarWinds; respond to alerts.
• Perform root-cause analysis and resolve issues across cloud and on-prem.
• Support disaster recovery planning, backups, and failover testing.
• Maintain accurate network diagrams, configuration records, and SOPs.

Skills

Troubleshooting

Documentation

Communication

Tools

PRTG

SolarWinds

VMware ESXi

Hyper-V

Fortinet/FORTIGATE

Azure AD/Entra ID

Job description

Strategic Analysis, Inc. is seeking an experienced Network Administrator to support, maintain, and enhance our on-premise and cloud IT infrastructure.

This role ensures high availability, security, compliance, and performance across enterprise systems by managing physical network gear and Microsoft 365 services in hybrid environments. The ideal candidate will troubleshoot complex issues, strengthen security, document solutions, and collaborate with IT teams to support end users and drive