Job Description

Position: Microsoft 365 Administrator

Location: Milford, Massachusetts

Work Model: Onsite Contract

Experience: 8+ Year

Job Summary

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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