Senior Microsoft Infrastructure Engineer (Microsoft 365 SME)

We're seeking a Senior Microsoft Infrastructure Engineer to join a growing technical team as the go-to Microsoft Subject Matter Expert (SME). This is an opportunity for an experienced engineer who thrives on designing, securing, and optimising modern Microsoft environments while acting as a trusted advisor to customers and internal stakeholders.

Working across a diverse customer base, you will lead the design and delivery of Microsoft 365, identity, endpoint management, and security solutions, helping organisations maximise their investment in Microsoft's cloud technologies.

What You'll Be Doing

Act as the Microsoft 365 SME, providing technical leadership and best practice guidance across customer environments. Design, deploy, and optimise Microsoft 365 solutions including Exchange Online, Teams, SharePoint Online, OneDrive, and Microsoft 365 Groups. Lead Microsoft tenant assessments, migrations, remediation projects, and platform modernisation initiatives. Architect and manage secure identity solutions using Microsoft Entra ID. Implement advanced Microsoft security technologies including Conditional Access, MFA, Passwordless Authentication, Privileged Identity Management (PIM), Microsoft Defender, and Microsoft Purview. Manage endpoint security and device lifecycle management through Microsoft Intune and Windows Autopilot. Apply Microsoft Zero Trust principles and security best practices across customer estates. Support compliance, governance, and security frameworks including GDPR and ISO-aligned standards. Drive automation and operational efficiency through PowerShell scripting and process improvement. Act as the senior escalation point for complex technical issues and project delivery. Mentor engineers and contribute to the development of technical standards and service excellence.What We're Looking For

Extensive hands-on experience with Microsoft 365 administration, architecture, and security. Deep technical expertise across: Microsoft Entra ID (Azure AD) Microsoft Intune & Windows Autopilot Microsoft Defender Suite Exchange Online SharePoint Online Microsoft Teams Conditional Access & Identity Security Strong understanding of endpoint management, identity governance, and Microsoft security best practices. Experience working within MSP, consultancy, or multi-tenant environments. Excellent stakeholder management and customer-facing communication skills. Ability to operate as a trusted Microsoft SME and technical authority.Desirable Experience

PowerShell scripting and automation. Microsoft Sentinel. Defender XDR. Experience driving technical standards, governance, and engineering improvements.Certifications (Desirable)

MS-102: Microsoft 365 Administrator MD-102: Endpoint Administrator SC-Series Security Certifications AZ-Series Azure CertificationsWhy Join Us?

This is an opportunity to become the Microsoft technical authority within a highly respected technology business. You'll work with the latest Microsoft cloud, security, and workplace technologies, influence technical strategy, and play a key role in delivering secure, modern workplace solutions for customers.

If you're passionate about Microsoft technologies and want a role where your expertise genuinely makes an impact, we'd love to hear from you.