Senior System Administrator

Leidos

Senior System Administrator leading Microsoft infrastructure and enterprise collaboration services at Leidos. Ensuring secure and scalable operations across Windows Server, Active Directory, Microsoft 365, and Azure.

Posted 5/28/2026full-timeRemote • Virginia • 🇺🇸 United StatesSenior💰 $92,300 - $166,850 per yearWebsite

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Hard Skills

Windows ServerActive DirectoryGroup PolicyMicrosoft 365Exchange OnlineSharePoint OnlineTeamsAzurePowerShellvirtual machines

Tools & Technologies

Microsoft TeamsAzure Active Directorycollaboration environmentsnetworking servicesconfiguration management

Certifications & Qualifications

Bachelors in a relevant field

Industry Keywords

system administrationenterprise systemscloud serviceshigh availabilityperformance

Tech Stack

Tools & technologies

AzureCloud

About the role

Key responsibilities & impact

Serve as the senior technical lead for enterprise Windows Server, Active Directory, and Group Policy administration.
Design and implement advanced configurations, upgrades, and hardening for Microsoft server and collaboration environments.
Administer Microsoft 365 services, including Exchange Online, SharePoint Online, and Teams, to ensure high availability and performance.
Design, deploy, and manage Azure resources, including virtual machines, storage, and networking services.
Lead integration of Azure cloud services with enterprise systems and on-premises dependencies.
Architect and support enterprise Microsoft Teams collaboration, conferencing, and streaming capabilities.
Develop and maintain PowerShell automation for provisioning, configuration management, and repeatable operations.

Requirements

What you’ll need

8+ years of experience in senior-level system administration roles focused on Microsoft technologies.
Extensive experience managing enterprise Windows Server environments, Active Directory, Group Policy, and Microsoft 365 services (Exchange Online, SharePoint Online, Teams).
Strong experience supporting Azure services and resources, including Azure Active Directory (Entra ID), virtual machines, storage, and networking.
Experience architecting and supporting Microsoft Teams video conferencing, Teams Live Events, and enterprise streaming solutions.
Bachelors in a relevant field.

Benefits

Comp & perks

Health and Wellness programs
Income Protection
Paid Leave
Retirement