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

Infosec
London, City And County Of the City Of London, United Kingdom
3 weeks ago
£75,000 – £85,000 pa

Salary

£75,000 – £85,000 pa

Seniority
Lead
Posted
18 Sep 2026 (3 weeks ago)

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

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