Microsoft 365 Messaging & Collaboration Engineer
Hybrid - 4 days on-site p/w in London
Inside IR35 Contract
Are you a Microsoft 365 messaging specialist who wants to be the technical authority for Exchange Online, Teams and the security that sits around them?
We're recruiting for a contract Messaging & Collaboration Engineer to join the client services team of a leading global financial services organisation. You'll lead the engineering and evolution of its Microsoft 365 messaging and collaboration platforms, acting as the Tier 3 escalation point and working closely with architecture, security, infrastructure and business stakeholders.
What You'll Be Doing
- Leading the engineering, design and continual evolution of Exchange Online, Teams and wider Microsoft 365 collaboration services
- Leading messaging migrations, tenant optimisation and transformation initiatives
- Implementing and managing Defender for Office 365, Exchange Online Protection and Proofpoint integrations
- Designing Microsoft Purview capabilities including information protection, DLP, retention and eDiscovery
- Maintaining secure mail flow with SPF, DKIM and DMARC
- Providing Tier 3 support and automating with PowerShell and Microsoft Graph
- Driving adoption of Microsoft 365 Copilot and mentoring engineers
What You'll Bring
- 5+ years engineering Microsoft 365 messaging and collaboration platforms
- Expert knowledge of Exchange Online and Microsoft Teams in enterprise environments
- Microsoft Purview, Defender for Office 365 and enterprise email security (Proofpoint preferred)
- Exchange Hybrid and mail migrations, Entra ID and Conditional Access, Intune
- PowerShell and Microsoft Graph automation
- DNS, SMTP and certificate knowledge, and ITIL service management
- Experience in global or multi-tenant, regulated environments
Desirable: Copilot readiness and adoption, Teams Telephony, SharePoint Online and OneDrive, Power Platform, Azure Automation and Logic Apps, Zero Trust
Please note: this role needs four days a week on site in London.
Apply today with your CV for this Messaging & Collaboration Engineer contract role and we'll be in touch.
This role may suit candidates who have held roles including: Exchange Online Engineer, Microsoft 365 Engineer, Messaging Engineer, Office 365 Engineer, Collaboration Engineer, Teams Engineer, M365 Messaging SME


