M365 - Windows Systems Admin

Job Title: Tier 3 Microsoft 365 Administrator

Can be remote but pefer local to Denver or Brentwood, TN . It's ideal if they can go to the office 3 days per month but not required.

Job Summary
We are seeking a highly skilled Tier 3 Microsoft 365 Administrator to provide advanced technical support, administration, and engineering for our Microsoft 365 environment. This role serves as the 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:
oSharePoint Admin Center (Online sites, permissions, governance, storage, sharing)
oExchange Admin Center (Online mailboxes, transport rules, retention, hybrid configurations)
oTeams 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 to resolution

Security, Compliance & Governance
Partner with security teams to implement and maintain:
oConditional Access policies
oData Loss Prevention (DLP)
oRetention 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:
oSharePoint Online and SharePoint Admin Center
oExchange Online and Exchange Admin Center
oMicrosoft 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

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 M365
Experience in regulated or highly secure environments

Working Conditions
May require participation in on-call rotation for critical incidents
Hybrid or remote work options depending on business needs