AD Engineer – Contract
£600 per day | Inside IR35London | 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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