IT Infrastructure Platform Architect

As a Senior IT Infrastructure Engineer, you will engineer, implement, and operate Microsoft 365, Azure, Exchange Online and identity platforms to deliver secure, automated, and resilient services. You collaborate across Architecture, Security, Development, and Operations to ensure solutions are scalable and well-integrated. You drive standardisation, automation, and operational excellence to reduce risk and manual effort while improving stability. This role offers impactful work on cloud and identity platforms within a security‑minded, cross‑functional team.

• Engineer and support M365, Azure, Exchange Online, and Identity platforms to ensure secure, resilient, and automated operations
• Implement and manage Microsoft 365 services (Teams, Exchange, SharePoint, OneDrive, Intune) with governance and security controls
• Deploy and govern Azure landing zones, subscriptions, connectivity, and platform services
• Design, administer, and support Exchange Online within Microsoft 365
• Engineer Active Directory and Entra ID, including authentication, Conditional Access, and identity governance
• Maintain cloud security, monitoring, logging, encryption, and policy enforcement
• Deliver standardisation and automation across cloud and identity platforms
• Provide senior escalation support for engineering and operational issues
• Participate in on-call rota for incident support
• Lead cross‑domain collaboration with Architecture, Security, Development, and Infrastructure teams
• Engage with vendors for implementation, operation, and issue resolution
• Support incident, problem, and continuous service improvement activities
• Drive automation, standardisation, and optimisation to reduce manual effort and complexity
• Ensure BAU lifecycle alignment and operational governance

• Extensive experience with Exchange Online, Identity, workplace, and Azure Cloud
• Microsoft 365 configuration, administration, and security expertise
• Exchange Online administration and Defender for Office 365
• Exchange Online Protection
• Email authentication technologies SPF, DKIM, DMARC
• Microsoft Purview, Compliance Center, retention policies
• Tenant‑level Exchange administration using EAC and PowerShell
• Azure cloud engineering including deployments, governance, and connectivity
• Identity and access management with Active Directory, Entra ID, and Azure AD Connect
• Security configuration and resilience practices
• Automation and operational tooling (PowerShell, scripts, IaC concepts)
• Strong troubleshooting and problem‑solving
• Experience in enterprise‑scale environments

• Collaboration across multiple teams
• Strong ownership and accountability
• Clear communication
• Microsoft 365 administration and security
• Exchange Online administration
• Defender for Office 365 and Exchange Online Protection