Microsoft 365 Administrator - Tier 3

Our client is currently seeking a Microsoft 365 Administrator - Tier 3

Location: Denver, CO 80202Alternate location: Brentwood, TNWork Model: Hybrid - only 3 days onsite per month (mostly remote!)Duration: 8 months with possibility to Contract to Hire

Minimum qualifications

• years of experience administering Microsoft in an enterprise environment.
• Experience with SharePoint Online and the SharePoint Admin Center.
• Experience with Exchange Online and the Exchange Admin Center.
• Experience with Microsoft Teams and the Teams Admin Center.
• Experience writing and maintaining PowerShell scripts for Microsoft administration.
• Experience with Azure AD / Entra ID, including identity, authentication, and access management.
• Experience troubleshooting hybrid environments, including on-premises Active Directory and Exchange hybrid.
• Ability to analyze issues, document solutions, and communicate effectively with technical and non-technical stakeholders.

Preferred qualifications

• Microsoft certifications such as -, Exchange, Teams, or Microsoft Security certifications.
• Experience with Microsoft Purview, Defender for Office , and Intune.
• Experience supporting or leading large-scale migrations to Microsoft .
• Experience working in regulated or highly secure enterprise environments.

About the job

A large enterprise organization is seeking a Senior Microsoft Engineer to support, optimize, and enhance its collaboration and productivity environment. In this role, you will serve as a senior technical resource responsible for administration, engineering, escalation support, automation, and governance across core Microsoft services.

You will work across SharePoint Online, Exchange Online, Microsoft Teams, and identity-related technologies to maintain platform stability, improve operational efficiency, and support secure enterprise collaboration. This role also includes partnering with cross-functional teams on security, compliance, and architectural initiatives.

Responsibilities

• Administer and optimize Microsoft services, including SharePoint Online, Exchange Online, and Microsoft Teams.
• Manage tenant-wide settings, licensing, service health, governance, and capacity planning.
• Design, implement, and maintain Microsoft configurations aligned with enterprise standards and best practices.
• Serve as the Tier escalation point for complex incidents, platform issues, and service degradation.
• Perform root cause analysis and implement long-term corrective and preventive actions.
• Coordinate with Microsoft support teams and manage cases through resolution when needed.
• Partner with security teams to implement and maintain Conditional Access, Data Loss Prevention, retention, and eDiscovery policies.
• Support compliance requirements, audits, and security reviews related to Microsoft services.
• Develop and maintain automation using PowerShell, Microsoft Graph, and Microsoft APIs.
• Improve operational efficiency through scripting, standardization, and self-service tooling.
• Evaluate and implement new Microsoft features and capabilities where appropriate.
• Create and maintain technical documentation, runbooks, and operational standards.
• Mentor Tier and Tier support staff and provide guidance on escalated issues.
• Contribute architectural input for Microsoft -related projects, upgrades, and migrations.

Working conditions

• Participation in an on-call rotation may be required for critical incidents.
• Hybrid or remote work options may be available based on business needs.