Infrastructure Engineer - Zero Trust & M365 Lead (SC Cleared)

Infosec
City of London, Greater London
Our client, a cyber security organisation specialising in secure cloud and infrastructure solutions, is seeking a Senior ICT Infrastructure Engineer: Zero Trust & M365 Lead for a permanent position. The role will provide technical leadership across Microsoft 365, Azure security, identity, endpoint management and Zero Trust architecture.

Key Responsibilities:

Take technical ownership of Microsoft 365 platforms, including Exchange Online, SharePoint Online, Teams and OneDrive
Design, implement and govern Microsoft Entra ID, hybrid identity and cloud governance solutions
Manage endpoints through Microsoft Intune, Autopilot, endpoint security and device compliance policies
Implement and maintain Zero Trust security controls, Conditional Access and Privileged Identity Management
Provide first, second and third line technical support, including escalation management
Create and govern security baselines in line with organisational and regulatory requirements
Automate infrastructure and security processes using PowerShell, Microsoft Graph API and Terraform
Support compliance with ISO 27001, GDPR and Cyber Essentials requirements while mentoring junior engineers

Job Requirements:

Significant experience in Microsoft 365 administration, infrastructure engineering or cyber security
Strong knowledge of MS Exchange, Exchange Online, SharePoint and Microsoft 365 services
Practical experience with M365 security, Azure Security and the Microsoft Defender suite
Understanding of Zero Trust architecture, Conditional Access, identity governance and security baselines
Experience managing Microsoft Intune, Autopilot, endpoint security and device compliance
Proficiency in PowerShell, with an understanding of Microsoft Graph API and Terraform automation
Knowledge of Microsoft Purview, security monitoring, reporting and cloud governance
Strong troubleshooting, escalation management, communication and mentoring skills

Benefits:

Permanent opportunity within the cyber security and ICT infrastructure sector
Opportunity to lead Microsoft 365 and Zero Trust initiatives
Exposure to Microsoft Azure, identity security, endpoint management and cloud governance
Support for continued technical development and knowledge sharing
Collaborative environment with the opportunity to mentor and support junior engineers
If you are an experienced ICT Infrastructure Engineer with strong Microsoft 365, Azure Security and Zero Trust expertise, apply now to take on this senior technical leadership opportunity
Posted 2026-09-18

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