Job Senior Microsoft 365 Platform Engineer

Senior Microsoft 365 Platform Engineer Location: Berwyn, PA, US, 19312 Business Unit: Nul Posting Date: Jul 7, 2026 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. Key Responsibilities Platform Architecture & Governance M365 Operations & Engineering Security, Compliance & Identity AI, Automation & Innovation Collaboration & Stakeholder Engagement Qualifications: Required: Bachelor's degree in Information Systems, Computer Science, or a closely related field; equivalent professional experience considered. 7+ years of hands-on experience administering a single, large-scale Microsoft 365 commercial tenant with a global user base along with administering a GCCH tenant. Deep expertise across Exchange Online, SharePoint Online, Microsoft Teams, OneDrive, and Power Platform. Strong working knowledge of Microsoft 365 security, compliance, and governance features, including Microsoft Purview. Demonstrated experience implementing and supporting Information Protection, DLP, Data Lifecycle Management, Insider Risk Management, Microsoft Defender, and Teams Phone System. Proficiency in Microsoft Copilot administration, including agent management, Copilot Credits, and Pay-as-you-Go licensing models. Hands-on experience with eDiscovery, including conducting searches and producing data exports for legal and investigative purposes. Experience executing tenant-to-tenant migrations using tools like Sharegate and Quest ODM. Strong scripting skills (PowerShell, Graph API) with a focus on automating M365 service management and reporting. Knowledge of Power Automate, Power Apps, and Microsoft Intune. Ability to administer Microsoft services across Windows, macOS, iOS, and Android platforms. Excellent analytical and troubleshooting skills with a demonstrated ability to diagnose complex, multi-layered issues and implement effective solutions. Strong written and verbal communication skills; able to clearly convey technical concepts to both technical and non-technical audiences at all organizational levels. Proven ability to manage competing priorities, meet deadlines, and maintain composure in a fast-paced, globally distributed environment. High degree of discretion and integrity when handling confidential or sensitive information. Preferred: Experience with Proofpoint, including Email Protection, Secure Email Relay, Threat Response Auto-Pull, and Targeted Attack Protection. Familiarity with ITIL frameworks and change management processes in an enterprise environment. Experience managing multi-geo or multi-national M365 configurations, including data residency and sovereignty considerations. Understanding of Zero Trust principles and their application within the M365 and Entra ID ecosystem. Experience implementing and/or managing Box. Success Profile: The ideal candidate combines deep technical expertise with the strategic mindset of a platform owner. They are intellectually curious, staying ahead of Microsoft's evolving product roadmap, and are equally comfortable architecting long-term solutions and diving into complex incident resolution. They build trusted relationships across IT and the business, communicate with clarity and credibility, and bring a continuous-improvement mindset to everything they touch.