IT Systems Administrator — Windows, 365 & Networking

SelectOne; Buffalo (NY); On-site; USD 65,000 - 90,000; Full time

Job summary

SelectOne is seeking a Systems Administrator in Buffalo, NY to provide advanced technical support and help manage our IT infrastructure. You will escalate complex issues from Tier 1, troubleshoot Windows, Microsoft 365, AD/Entra ID, networking, and endpoint management, and contribute to process improvements.

You'll gain exposure to Windows Server and VMware environments, maintain documentation, and support security tooling and patching through RMM/MDM platforms while mentoring Tier 1 staff.

Qualifications

• 2–3+ years of IT support or systems administration experience.
• Strong hands-on experience with Windows environments and Microsoft 365.
• Familiarity with Active Directory or Entra ID and basic networking.
• PowerShell experience and relevant certifications preferred.

Responsibilities

• Serve as an escalation point for Tier 1 and resolve more complex hardware, software, connectivity and user access issues.
• Support Windows 11 endpoints and Microsoft 365 applications including Outlook, Teams, OneDrive and SharePoint.
• Administer users, groups, permissions and access within Active Directory and Entra ID.
• Deploy and maintain applications, patches, security tools and endpoint policies through RMM/MDM platforms.
• Troubleshoot network connectivity including DNS, DHCP, Wi-Fi, VPNs and VLANs.
• Assist with Windows Server, VMware, file shares, backups and other infrastructure-related issues.
• Use PowerShell for troubleshooting, reporting and basic administrative tasks.
• Identify root causes of recurring issues and implement longer-term solutions.
• Maintain technical documentation and provide guidance to Tier 1 support.

Skills

Windows administration

Microsoft 365

Active Directory/Entra ID

Networking basics

PowerShell

Endpoint management

Tools

VMware

RMM/MDM platforms

Entra ID admin tools

Job description

SelectOne is seeking a Systems Administrator in Buffalo, NY to provide advanced technical support and help manage our IT infrastructure. You will escalate complex issues from Tier 1, troubleshoot Windows, Microsoft 365, AD/Entra ID, networking, and endpoint management, and contribute to process improvements.

You'll gain exposure to Windows Server and VMware environments, maintain documentation, and support security tooling and patching through RMM/MDM platforms while mentoring Tier 1 staff.