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

• Lead and execute transformative projects for enterprise infrastructure (35%)
• Eliminate technical debt through migrations and upgrades while modernizing current processes (20%)
• Provide Tier 3 technical support, offering industry expertise on complex issues (20%)
• Implement and manage backup, recovery, and high-availability strategies for data protection and uptime (15%)
• Maintain accurate documentation of configurations, policies, and procedures for compliance (10%)
• Monitor system health, manage patching and platform lifecycles, and remediate vulnerabilities
• Establish infrastructure standards and mentor other administrators through technical guidance and knowledge transfer

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 Autopiler; JAMF experience for macOS 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.