AD Engineer – Contract

£600 per day | Inside IR35
London | 2–3 days per week onsite

We’re looking for an experienced AD Engineer to join a global enterprise IT environment, supporting and developing core infrastructure services across on-premise and cloud environments.

This is a hands-on role focused on the management, support and lifecycle of Active Directory and Microsoft infrastructure, with strong exposure to Azure and Entra ID.

Key Responsibilities

• Manage and support Active Directory, including OU design, GPOs, Group Policy Preferences, Domain Controllers and roles management.

• Manage core infrastructure services including DNS, DHCP, WINS and PKI/certificate services.

• Support and manage Azure and Microsoft Entra ID services, including:

  • Conditional Access

  • Role and Group Management

  • Entra Connect

  • Microsoft Authenticator

  • On-premise Active Directory integration

  • Group Policy and Intune policies

  • Defender for Identity

• Support SSO and authentication services across the enterprise.

• Perform server migrations, upgrades, security patching and application migrations.

• Troubleshoot complex infrastructure issues and proactively identify potential service-impacting problems.

• Work closely with Information Security to maintain infrastructure compliance.

• Develop and maintain technical documentation, procedures, RCAs and knowledge articles.

• Lead project and BAU activities, working with internal teams, suppliers and wider stakeholders.

• Provide technical leadership, mentoring and guidance to other team members.

• Contribute to infrastructure roadmaps, technology lifecycle management and service improvements.

Essential Experience

• 5+ years’ experience working with Microsoft infrastructure in an enterprise environment.

• Strong hands-on expertise across Active Directory, Group Policy, DNS and DHCP.

• Strong knowledge of Microsoft Azure and Entra ID.

• Extensive PowerShell scripting experience, including creation, testing and modification.

• Experience with PKI, certificate management and Domain Controller administration.

• Experience supporting SSO and authentication technologies.

• Experience with server migrations, upgrades, patching and application migrations.

• Understanding of high availability, disaster recovery and clustering.

• Experience supporting global infrastructure environments.

• Strong troubleshooting, analytical and problem-solving skills.

• Ability to communicate effectively with technical and non-technical stakeholders.

Desirable

• F5 BIG-IP / load balancing experience.

• Experience migrating services to Azure.

• Microsoft certifications across Active Directory, Azure or related technologies.

• ITIL Foundation certification or demonstrable ITIL working practices.

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