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Systems Administrator

Robert Half

O'Fallon, MO 63366-1900 • $70,000 to $85,000 / yr • 10/16/2026

Job Description

Job 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

Required

  • 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

Nice to Have (Can Be Learned On the Job)

  • 3CX
  • Veeam
  • Microsoft Purview
  • Fortinet products