M365 Administrator

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  (Azure AD), Exchange Online, SharePoint Online, One Drive, 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 Power Shell 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

* One Drive 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  (Azure AD)

* Exchange Online

* SharePoint Online / One Drive

* Microsoft Teams

* Proficiency with Power Shell 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, Bit Titan, Share Gate)

* 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

Company Description

Waters Corporation (NYSE:

WAT) is a global leader in life sciences and diagnostics, dedicated to accelerating the benefits of pioneering science through analytical technologies, informatics, and service. With a focus on regulated, high-volume testing environments, our innovative portfolio harnesses deep scientific expertise across chemistry, physics, and biology. We collaborate with customers around the world to advance the release of effective, high-quality medicines, ensure the safety of food and water, and drive better patient outcomes by detecting diseases earlier, managing routine infections, and combating antibiotic resistance.

Through a shared culture of relentless innovation, our passionate team of ~16,000 colleagues…