M365 Administrator

Waters Corporation • Milford, MA

5d

About The Position

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.

Requirements

• 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

Nice To Haves

• 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

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

What This Job Offers

• Job Type: Full-time
• Career Level: Mid Level
• Education Level: No Education Listed