Microsoft 365 Administrator (Tier 3)
Location: Denver, CO OR Brentwood, TN (Onsite 3 days/month Tues/Weds/Thurs of the 2nd full week)
Type: 8-Month Contract
Environment: Enterprise (Hybrid M365/Azure AD/OnPrem)
SUMMARY
We are looking for a seniorlevel Tier 3 Microsoft 365 Administrator to lead advanced administration, engineering, and support of a large-scale M365 environment. This role is the highest technical escalation point and partners closely with security, identity, and infrastructure teams to ensure a secure, wellgoverned, and highly available M365 platform.
KEY RESPONSIBILITIES
Microsoft 365 Administration & Engineering
- Administer, configure, and optimize:
- SharePoint Online (sites, permissions, governance, storage, sharing)
- Exchange Online (mailboxes, transport rules, retention, hybrid config)
- Teams Admin Center (voice, meetings, policies, apps, integrations)
- Manage tenantwide settings, licensing, monitoring, service health, capacity planning.
- Design and implement M365 solutions aligned with enterprise standards.
Tier 3 Escalation & Incident Response
- Serve as the top escalation point for complex M365 issues.
- Perform full RCA and implement permanent corrective actions.
- Manage Microsoft Premier/Unified Support escalations.
Security, Compliance & Governance
- Implement and maintain:
- Conditional Access
- DLP policies
- Retention & eDiscovery
- Partner with security during audits and compliance reviews.
Automation & Optimization
- Build automation using PowerShell, Microsoft Graph, and M365 APIs.
- Improve operational efficiency through scripting and standardization.
- Evaluate and deploy new features across the tenant.
Collaboration & Leadership
- Mentor Tier 1 2 support teams.
- Maintain documentation and runbooks.
- Provide architectural input for migrations and enterprise initiatives.
REQUIRED QUALIFICATIONS
- 5+ years administering Microsoft 365 in an enterprise environment.
- Expertlevel skills in:
- SharePoint Online & SharePoint Admin Center
- Exchange Online & Exchange Admin Center
- Microsoft Teams & Teams Admin Center
- Strong PowerShell automation experience.
- Solid knowledge of Azure AD/Entra ID.
- Hybrid troubleshooting experience (onprem AD, Exchange hybrid).
- Strong communication, RCA, and documentation skills.
PREFERRED QUALIFICATIONS
- MS-102, Exchange, Teams, or Securityfocused Microsoft certifications.
- Experience with:
- Microsoft Purview
- Defender for Office 365
- Intune / Endpoint Management
- Largescale migration experience.
- Experience in regulated industries.
WORKING CONDITIONS
- Onsite 3 days/month (2nd full week).
- Occasional oncall participation.
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