Infrastructure Security Engineer

Anson McCade
London
9 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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