AD Engineer

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.