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# Systems Administrator

- **Company:** Robert Half
- **Location:** O'Fallon, MO, United States
- **Experience:** Experienced
- **Contract:** Temporary contract
- **Skills:** Microsoft Windows, Active Directory, Artificial Intelligence, VoIP, Hyper-V, Identity and Access Management, Microsoft Software, Windows Servers, Networking Basics, Windows PowerShell, Azure Active Directory, Virtualization Technology, Software Troubleshooting, Microsoft InTune, AI Platforms, User Accounts, Vmware
- **Published:** November 13, 2026
- **Apply:** https://dejobs.org/x/x/9EDDA9F69F2C4B8ABE5BB6D41834B490/job/

## About the Role

* 3+ years of Systems Administration, Infrastructure Support, or related IT experience
 * Experience supporting Microsoft 365
 * Experience with Windows Server
 * Experience managing Active Directory
 * Strong troubleshooting and problem-solving skills
 * Excellent communication and customer service skills
 * Desire to learn and grow within a Microsoft-centric environment

Preferred

 * Experience with Entra ID (Azure AD)
 * Experience with Microsoft Intune
 * PowerShell scripting exposure
 * Virtualization experience (VMware or Hyper-V)
 * Backup and disaster recovery experience
 * Basic networking knowledge

## Description

We're partnering with a growing organization seeking a Systems Administrator to join their close-knit IT team. This is a great opportunity for someone with a solid foundation in Microsoft technologies who enjoys hands-on infrastructure work and wants to continue growing their skills.

You'll work alongside experienced IT professionals supporting a Microsoft-focused environment while gaining exposure to new technologies, infrastructure projects, and emerging Microsoft AI solutions.

This is an onsite role that does require 1 Saturday a month virtual for pushing updates

What You'll Be Doing

 * Administer and support Microsoft 365 and Exchange Online
 * Maintain and troubleshoot Windows Server environments
 * Manage Active Directory and Entra ID user accounts, groups, and permissions
 * Assist with onboarding, offboarding, and access management
 * Monitor system health, performance, and availability
 * Perform server patching, upgrades, and routine maintenance
 * Support backup and recovery processes
 * Troubleshoot infrastructure and end-user issues
 * Assist with administration of the company's 3CX VoIP environment
 * Participate in infrastructure improvements and technology implementations
 * Explore and evaluate new Microsoft technologies, including AI-related initiatives