Sr. Microsoft Administrator

About the role

The Senior Microsoft Administrator serves as a senior technical resource responsible for the architecture, administration, security, stability, and continuous improvement of the organization’s Microsoft infrastructure environment. This role focuses on the design and optimization of Hyper-V virtualization, Microsoft Intune endpoint management, Microsoft 365 services, and hybrid identity through Active Directory and Microsoft Entra ID. The position provides expert-level troubleshooting and escalation support across Windows Server, Group Policy, PKI, Veeam, and related infrastructure technologies. Participation in on-call support, incident response, and planned maintenance outside normal business hours is required.

Responsibilities

• Monitor system health, manage patching and platform lifecycles, and remediate vulnerabilities.
• Lead major technical projects, establish infrastructure standards, and maintain operational documentation.
• Mentor other administrators through technical guidance and knowledge transfer.
• Provide Tier 3 technical support, offering industry expertise on complex issues.
• Implement and manage backup, recovery, and high-availability strategies for data protection and uptime.
• Eliminate technical debt through migrations, upgrades, and process modernization.
• Maintain accurate records of configurations, policies, and procedures for compliance.

Responsibility breakdown (percentages are guidelines and may vary):

• 35% – Lead and execute transformative projects for enterprise infrastructure.
• 20% – Eliminate technical debt through migrations and upgrades while modernizing processes.
• 20% – Provide Tier 3 technical support for complex issues.
• 15% – Implement and manage backup, recovery, and high-availability strategies.
• 10% – Maintain documentation and ensure compliance.

Skills

• Microsoft Intune & Modern Endpoint Management: Proven expertise managing device compliance, configuration profiles, app deployment, and conditional access via Intune (MDM/MAM). Device provisioning with Autopilot; JAMF experience for macOS is a plus.
• Hyper-V Virtualization: Design, deployment, and administration of Hyper-V hosts and virtual infrastructure, including clustering, live migration, and capacity planning.
• Microsoft 365 Administration: Deep hands-on experience administering Exchange Online, SharePoint Online, Teams, and O365 security/compliance in an enterprise tenant.
• Windows Server & Client OS: Administration, patching, and hardening across current Microsoft server and desktop operating systems.
• Core Microsoft Infrastructure Services: Active Directory, Group Policy, PKI, and SCCM.
• Citrix Administration: Support of Citrix environments (CVAD, PVS); NetScaler experience is a plus.
• Backup & Disaster Recovery: Implementation and management of enterprise backup and DR solutions (Veeam preferred).
• Automation & Scripting: Proficiency with PowerShell and command-line scripting to automate provisioning, reporting, and routine administration.
• Networking Fundamentals: Working knowledge of TCP/IP, DNS, DHCP, VLANs, and firewall concepts to support infrastructure troubleshooting.

Qualifications

• Bachelor's degree in Computer Science, Information Technology, or related field (or equivalent experience).
• 10+ years of hands-on experience with system administration.