Senior M365 Engineer (12-Month Contract) Location: London, UK (Local SME for PL Re) Duration: 12 Months Work Mode: 4 Days in Office Role Overview We are seeking a Senior M365 Engineer for a 12-month contract to serve as a Subject Matter Expert (SME) in our London office. You will lead critical migrations, manage local stakeholder governance for our PL Re division, and partner with global engineering on Copilot and new feature adoption. Key Initiatives & Responsibilities Migrations & Projects: Lead Mimecast-to-M365 and home drive-to-OneDrive migrations; manage retention/compliance policy rollouts. Network & Performance: Resolve Teams and network-related issues for London and international offices. Security & Mail Flow: Act as Line 1 security expert (EOP, mail flow rules, routing, encryption) and manage Proofpoint integrations. Architecture & Strategy: Design and implement M365 solutions in a global environment, assist with the enterprise roadmap, and provide expert technical assistance to business units. Compliance: Participate in security reviews and manage e-discovery, legal holds, and archived solutions. Operations: Support core services (Teams, OneDrive, Exchange, SPO), monitor service updates/roadmaps, and handle escalated incidents. Required Experience 8+ years: SME-level experience in M365 security, architecture, and design (Exchange Online, SPO, Intune, Azure AD, OneDrive, Teams). 5+ years: Exchange Admin...