Microsoft 365 Administrator - SharePoint

Core Specialty Insurance Holdings, Inc.•Cincinnati, OH

5d•Hybrid

About The Position

Lead the delivery, administration, and continuous improvement of enterprise collaboration services — primarily SharePoint Online within Microsoft 365 — enabling employees to communicate, share information, and work effectively. This role serves as a senior operational and escalation resource for collaboration platforms, working closely cross-team to maintain service quality and resolve escalated issues.

Requirements

Applicants must be authorized to work for any employer in the U.S. We are unable to sponsor or take over work authorization sponsorship now or in the future for this position.
Bachelor Degree in Computer Science or Engineering or equivalent work experience.
5+ years of experience in an IT operations or systems administration role with direct responsibility for SharePoint Online in Microsoft 365 or Office 365 environments
Demonstrated experience supporting end users on collaboration platform issues and requests in an enterprise environment
Experience planning and executing SharePoint migrations (file shares, legacy SharePoint versions, or tenant-to-tenant)
Experience working within Agile or Kanban-based team workflows, participating in sprint planning, stand-ups, or similar structured delivery cadences
Track record of maintaining accurate documentation and contributing to knowledge base articles or operational runbooks
Expert knowledge of SharePoint Online and OneDrive for Business; working knowledge of the other Microsoft 365 core workloads: Exchange Online, Microsoft Teams, and the M365 Admin Center
Strong understanding of SharePoint permissions management, sharing and external access controls, and site governance
Solid understanding of Entra ID (Azure AD) concepts including user accounts, groups, conditional access policies, and licensing management
Understanding of ITSM principles and experience working within a ticketing system (e.g., ServiceNow, Jira Service Management)
Strong proficiency with PowerShell scripting for M365 administration tasks (SharePoint Online Management Shell, PnP PowerShell, Exchange Online PowerShell, Microsoft Graph API)
Understanding of email security fundamentals including SPF, DKIM, DMARC, and anti-spam/anti-phishing policy management
Familiarity with Microsoft 365 compliance and data governance concepts (retention policies, DLP, sensitivity labels), particularly as applied to SharePoint and OneDrive

Nice To Haves

Microsoft 365 Certified: Administrator Expert (MS-102) or comparable Microsoft certification preferred
Experience with Microsoft Intune for device compliance monitoring or co-management scenarios
Exposure to Microsoft Purview or Power Platform tooling
Familiarity with identity governance practices and privileged access management concepts

Responsibilities

Administer and support day-to-day operations of SharePoint Online and OneDrive, plus related Microsoft 365 services including Exchange Online, Teams, and other collaboration tools
Own SharePoint Online architecture and governance, including site provisioning standards, permissions models, information architecture, and site lifecycle management
Monitor service health across M365 workloads, respond to alerts, and coordinate with Microsoft support on service incidents and degradations
Manage user and group provisioning, licensing assignments, and access reviews within Entra ID (Azure Active Directory) in alignment with IT policy
Serve as the escalation point for tier-2 and tier-3 collaboration service requests and incidents, ensuring timely resolution and clear communication with end users
Maintain documentation for service configurations, operational runbooks, known issues, and standard procedures
Support the onboarding and offboarding of users across M365 services, including mailbox provisioning, Teams membership, and SharePoint site access
Lead the rollout of new SharePoint and M365 features and updates, coordinating testing and communicating changes to stakeholders
Drive continuous improvement efforts by identifying recurring issues, service gaps, and opportunities for automation or process optimization
Mentor junior administrators and helpdesk staff on SharePoint support practices and escalation handling
Support Microsoft 365 Copilot enablement, including SharePoint content readiness, permissions hygiene, and oversharing controls