Microsoft 365 Messaging & Collaboration Engineer

In this role, you will own the engineering and evolution of Microsoft 365 messaging and collaboration platforms, focusing on Exchange Online and Teams within a regulated, multi-tenant environment. You will act as a Tier 3 technical authority, collaborating with architecture, security, and business stakeholders to drive migrations, optimisations, and security controls. You will enable adoption of advanced tools like Copilot and mentor engineers to raise capabilities across the team. This is a hands-on, impact-driven position in a leading global financial services organization.

• Lead the design, engineering, and ongoing evolution of Exchange Online, Teams, and Microsoft 365 collaboration services
• Drive messaging migrations, tenant optimisation, and transformation initiatives
• Implement and manage Defender for Office 365, Exchange Online Protection, and Proofpoint integrations
• Design and configure Microsoft Purview for information protection, DLP, retention, and eDiscovery
• Maintain secure mail flow using SPF, DKIM, and DMARC
• Provide Tier 3 support and automate tasks with PowerShell and Microsoft Graph
• Promote adoption of Microsoft 365 Copilot and mentor other engineers

• 5+ years of engineering experience with Microsoft 365 messaging and collaboration platforms
• Expert knowledge of Exchange Online and Microsoft Teams in enterprise environments
• Experience with Microsoft Purview, Defender for Office 365, and enterprise email security (Proofpoint preferred)
• Exchange Hybrid and mail migrations experience; knowledge of Entra ID and Conditional Access; Intune
• PowerShell and Microsoft Graph automation
• DNS, SMTP, and certificate knowledge; ITIL service management
• Experience in global or multi-tenant, regulated environments

• stakeholder collaboration
• mentoring and coaching
• strong communication
• Exchange Online
• Microsoft Teams
• Defender for Office 365