Tier 3 M365 Admin

Job Title: Tier 3 Microsoft 365 Engineer

Duration: 9+ Month Contract (with possibility for extension or conversion)

Location: Denver, CO or Brentwood, TN

Work Schedule: Hybrid â€" Must be onsite 3 days per month (Tuesday, Wednesday, Thursday of the 2nd full week each month)

Job Summary
We are seeking a highly skilled Tier 3 Microsoft 365 Engineer to provide advanced technical support, administration, and engineering for our Microsoft 365 environment.


This role serves as the highest-level escalation point for complex issues, leads platform optimization efforts, and partners closely with security, identity, and infrastructure teams to ensure a secure, scalable, and reliable M365 ecosystem.

Key Responsibilities Microsoft 365 Administration & Engineering

• Administer and optimize Microsoft 365 services with deep hands-on ownership of:
  
  
  • SharePoint Admin Center (Online sites, permissions, governance, storage, sharing)
  • Exchange Admin Center (Online mailboxes, transport rules, retention, hybrid configurations)
  • Teams Admin Center (Policies, voice, meetings, apps, and integrations)
• Design, implement, and maintain M365 configurations aligned with organizational standards and best practices
• Manage tenant-wide settings, service health, licensing, and capacity planning

Tier 3 Support & Escalation

• Act as the highest-level escalation point for complex M365 incidents and service degradation
• Perform root cause analysis (RCA) and implement long-term corrective actions
• Engage Microsoft Premier/Unified Support as needed and manage cases through resolution

Security, Compliance & Governance

• Partner with security teams to implement and maintain:
  
  
  • Conditional Access policies
  • Data Loss Prevention (DLP)
  • Retention and eDiscovery policies
• Ensure compliance with organizational and regulatory requirements
• Support audits and security reviews related to M365 services

Automation & Optimization

• Develop and maintain automation using PowerShell, Microsoft Graph, and M365 APIs
• Improve operational efficiency through scripting, standardization, and self-service tooling
• Evaluate and deploy new M365 features and capabilities

Collaboration & Leadership

• Mentor Tier 1 and Tier 2 support staff
• Create and maintain technical documentation, runbooks, and standards
• Provide architectural input for M365-related projects and migrations

Required Qualifications

• 5+ years of experience administering Microsoft 365 in an enterprise environment
• Expert-level experience with:
  
  
  • SharePoint Online and SharePoint Admin Center
  • Exchange Online and Exchange Admin Center
  • Microsoft Teams and Teams Admin Center
• Strong PowerShell scripting skills for M365 administration
• Solid understanding of Azure AD / Entra ID (identity, authentication, and access management)
• Experience troubleshooting hybrid environments (on-prem AD, Exchange hybrid)
• Strong analytical, documentation, and communication skills
• Must be local to Denver, CO or Brentwood, TN and able to meet onsite requirements

Preferred Qualifications

• Microsoft certifications (e.g., MS-102, Exchange, Teams, or Security certifications)
• Experience with Microsoft Purview, Defender for Office 365, and Intune
• Familiarity with large-scale migrations to Microsoft 365
• Experience working in regulated or highly secure environments

Working Conditions

• Participation in an on-call rotation for critical incidents may be required
• Hybrid work model with defined onsite expectations

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