Senior System Administrator

Leidos

Senior technical lead for Microsoft infrastructure and collaboration services supporting SEC ISS contract. Ensuring secure and scalable operations across Microsoft platforms and services.

Posted 6/6/2026full-timeRemote • 🇺🇸 United StatesSenior💰 $92,300 - $166,850 per yearWebsite

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.
Ensure secure, reliable, and high-performing Microsoft platform operations across the enterprise.
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.
Bachelor’s in a relevant field.
Clearance: Ability to obtain and maintain SEC Public Trust (or higher if required).

Benefits

Comp & perks

Health and Wellness programs
Income Protection
Paid Leave
Retirement

ATS Keywords

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Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills & Tools

Windows ServerActive DirectoryGroup PolicyMicrosoft 365Exchange OnlineSharePoint OnlineTeamsAzurePowerShellvirtual machines

Certifications

Bachelor’s degreeSEC Public Trust clearance