Overview:
We are seeking a highly skilled Microsoft 365 Administrator with hands‑on experience supporting mergers and acquisitions (M&A). This role is responsible for the administration, security, and optimization of the Microsoft 365 platform, with a strong emphasis on tenant‑to‑tenant integrations, identity consolidation, data migrations, and post‑merger operational stabilization.
The ideal candidate has operated in complex, enterprise environments, understands the technical and organizational realities of M&A, and can partner closely with Infrastructure, Security, Legal, HR, and business stakeholders to deliver seamless integrations.
Responsibilities:
Microsoft 365 Platform Administration
* Administer and support Microsoft 365 services including Entra ID (Azure AD), Exchange Online, SharePoint Online, OneDrive, Teams, Power Platform, and M365 security/compliance features
* Manage tenant configuration, licensing, identity lifecycle, access controls, and service health monitoring
* Implement and maintain security best practices, including Conditional Access, MFA, role‑based access control, and privileged identity management
* Support automation and administration using PowerShell and Graph API
Mergers & Acquisitions (M&A) Integration
* Lead and support M365 integration activities for mergers, acquisitions, and divestitures
* Plan and execute tenant‑to‑tenant migrations, including:
* Exchange Online mailboxes
* OneDrive and SharePoint content
* Teams and collaboration workloads
* Design and implement identity consolidation strategies, including directory synchronization, account matching, and domain transitions
* Partner with Security and Legal teams to ensure data governance, retention, and compliance requirements are met during integrations
* Support Day‑0, Day‑1, and Day‑2 M&A readiness activities, including cutovers, coexistence, and post‑integration stabilization
* Develop migration runbooks, rollback plans, and post‑merger operational documentation
Collaboration & Operational Excellence
* Act as a technical escalation point for complex M365 issues
* Collaborate with Infrastructure, Service Desk, Security, and Application teams
* Participate in change management, incident response, and problem management processes
* Create and maintain technical documentation, standards, and operational procedures
* Provide guidance and mentoring to junior administrators and support teams
Qualifications:
* 5+ years of hands‑on Microsoft 365 administration experience in an enterprise environment
* Demonstrated experience supporting M&A activities, including tenant integrations or divestitures
* Strong expertise in:
* Microsoft Entra ID (Azure AD)
* Exchange Online
* SharePoint Online / OneDrive
* Microsoft Teams
* Proficiency with PowerShell for automation and administration
* Solid understanding of identity management, security, and compliance concepts
* Experience working in hybrid identity environments
* Strong troubleshooting, documentation, and communication skills
Preferred Qualifications
* Experience with third‑party migration tools (e.g., Quest, BitTitan, ShareGate)
* Familiarity with Microsoft Purview, eDiscovery, retention, and information protection
* Experience working in regulated or global enterprise environments
* Microsoft certifications such as:
* Microsoft 365 Administrator
* Identity and Access Administrator
* Security Administrator
* Prior experience supporting divestitures or carve‑outs
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