Infrastructure Engineer - Zero Trust & M365 Lead

Infosec; City Of London; On-site; GBP 75,000 - 85,000; Full time

Job summary

Infosec in City of London is seeking a Senior ICT Infrastructure Engineer to lead Zero Trust, Microsoft 365, and Azure security initiatives across identity, endpoint management and cloud governance.

You will own design and operation of M365 platforms (Exchange Online, SharePoint Online, Teams), implement Entra ID, Conditional Access, Intune, and automation with PowerShell, Graph API and Terraform.

Join a cyber security-focused team delivering secure cloud solutions and mentoring junior engineers.

Qualifications

• 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.

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

Skills

Microsoft 365

Exchange Online

SharePoint

Entra ID

Conditional Access

Intune

PowerShell

Graph API

Terraform

Zero Trust

Azure Security

M365 Security

Device Compliance

Security Governance

Tools

Terraform

PowerShell

Microsoft Graph API

Azure

Job description

Salary: £75,000 - 85,000 per year

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

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 solutionsi>
• 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

Technologies:

• API
• Azure
• Cloud
• ICT
• Support
• Microsoft 365
• Microsoft Intune
• PowerShell
• Security
• SharePoint
• Terraform
• Office 365
• DevOps

More:

Our client is a cyber security organisation specialising in secure cloud and infrastructure solutions. We are seeking a Senior ICT Infrastructure Engineer: Zero Trust & M365 Lead for a permanent position, offering technical leadership across Microsoft 365, Azure security, identity, endpoint management and Zero Trust architecture. This is a permanent opportunity within the cyber security and ICT infrastructure sector, with the chance to lead Microsoft 365 and Zero Trust initiatives, gain exposure to Microsoft Azure, identity security, endpoint management and cloud governance, and continue technical development in a collaborative environment where we support and mentor junior engineers.

last updated 38 week of 2026