Infrastructure Security Engineer

Anson McCade

London

8 months ago

Applications closed

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Location:London (1 day per week on-site)

Contract Length:6 months (extension possible)

Day Rate:Up to £850 (inside IR35)

Clearance Required:SC clearance (must be active)

Key Skills Required:Entra ID & Privileged Identity Management (PIM)

About the Role

Our client, a key delivery partner in UK government cyber security programmes, is seeking an experiencedMicrosoft Security Engineerto lead a critical technical delivery workstream. You will play a pivotal role in implementing a secure and scalable separation of high-privilege user accounts across a hybrid Active Directory and Microsoft Entra (Azure AD) environment.

This opportunity is fully funded and mid-flight, with a defined scope of work and direct stakeholder engagement.

Key Responsibilities

Conduct technical investigations into a complex hybrid On-Prem AD and Entra environment.
Design, document, test, and implement a secure approach to separating high-privilege accounts in line with NCSC and Microsoft best practices.
Execute closed user group testing, followed by phased rollout to 30–150 users with minimal disruption.
Produce high-quality documentation suitable for direct client consumption and governance.
Collaborate with internal and client security teams to ensure successful deployment.
Support incident response planning and execute break-glass scenarios as required.

Qualifications and Skills

Proven experience as aInfrastructure Engineer or Security Engineerwithin secure or government settings.
Deep expertise in Active Directory (OU design, GPOs, Tier-0 security models).
Advanced knowledge of Entra ID (Azure AD) and Entra AD Connect – especially filtering rules and sync troubleshooting.
Strong understanding ofPrivileged Identity Management (PIM)and associated alerting and approval workflows.
Experience in hybrid disentanglement of Tier-0 identities and secure re-provisioning.
Familiarity with zero-trust security principles, including PAW, least privilege, and attack surface reduction.
Confident author of technical documentation and test plans.
Strong communication skills and ability to manage client expectations under pressure.

Want to know more?

If you're a confident and capable Infrastructure / SecurityEngineer looking for your next challenge, apply now or reach out directly for more information.

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