Senior Microsoft 365 Platform Engineer

Job Title:

Senior Microsoft 365 Platform Engineer

Location:

Berwyn, PA, US, 19312

Business Unit:
Nul

We are seeking a highly skilled and results-driven Senior Microsoft Platform Engineer to join our global Information Technology team. This role is central to the design, implementation, and continuous improvement of our Microsoft 365 (M365) ecosystem, which underpins collaboration and productivity for more than 20,000 users worldwide.

Reporting to the Senior Manager, IT Collaboration, the successful candidate will bring deep expertise across Microsoft 365 workloads and Entra/Azure environment, both for a commercial and GCCH tenant. They will serve as a trusted technical authority, shaping platform strategy, driving adoption of emerging capabilities such as Agentic AI and Microsoft Copilot, and ensuring the platform meets the highest standards of security, compliance, and operational excellence.

This position demands a proactive leader who thrives in a dynamic, fast-paced environment and can balance strategic thinking with hands‑on execution.

• Lead the overall M365 platform architecture, establishing and evolving the operational governance model to ensure scalability, reliability, and alignment with enterprise objectives.
• Define and enforce standards for Exchange Online, SharePoint Online, Microsoft Teams, and Power Platform, ensuring consistent adoption of best practices across the organization.
• Develop and maintain comprehensive standards, process documentation, and control frameworks to support audit, compliance, and operational continuity requirements.
• Proactively monitor Microsoft roadmap updates, evaluate new features, drive adoption decisions, and establish governance policies for newly released capabilities.

• Manage and optimize a single, enterprise‑scale M365 tenant supporting over 20,000 global users.
• Lead and execute M365 tenant migration and integration projects, including development of detailed test plans, implementation plans, and project timelines.
• Provide expert‑level escalation support for complex M365 issues, coordinating with Microsoft and third‑party vendors as needed to reach timely resolution.
• Monitor system performance, service health, and end‑user impacting incidents; communicate status and remediation plans to stakeholders at appropriate levels.
• Build and maintain operational dashboards that deliver real‑time visibility into platform health, compliance posture, security status, and key performance indicators.

• Implement and manage Microsoft 365 security and compliance capabilities, including Information Protection, Data Loss Prevention, Data Lifecycle Management, Insider Risk Management, and Microsoft Defender.
• Support access management and identity governance by enabling single sign‑on across cloud services and assisting with Privileged Access Management (PAM) initiatives.
• Partner with the cybersecurity team to monitor security posture, enforce best practices, and translate compliance requirements into platform controls.
• Administer eDiscovery processes, including conducting searches and managing data exports to support legal proceedings and internal investigations.

• Drive the deployment and governance of Agentic AI solutions built on the Power Platform, partnering with business and functional teams to ensure responsible, policy‑aligned adoption.
• Assess the current Power Platform environment to identify gaps, recommend improvements, and lead the successful implementation of those enhancements.
• Develop and maintain automation frameworks and scripts to streamline the management of M365 services, reduce operational overhead, and improve consistency.
• Evaluate and operationalize Microsoft Copilot capabilities, including managing agent usage, Copilot Credits, and Pay‑as‑you‑Go licensing within the tenant.

• Partner with IT and functional teams across global regions to translate business requirements into scalable, well‑governed technical solutions.
• Lead the migration of telephony workloads to Microsoft Teams Phone System,…