Senior Active Directory & Identity Migration Consultant at Ashdown Group, London, £575-£600 per day

Senior Active Directory & Identity Migration Consultant

Contract | £600 per day | Outside IR35 | 3 months | Immediate start

Location: London / International time zones

We are seeking an experienced Senior Active Directory & Identity Migration Consultant to support a major enterprise identity transformation programme.

This is a high-impact contract role focused on consolidating multiple Active Directory environments into a single target domain. The programme includes UPN and primary email address changes, device domain migrations, user-profile migrations, permissions remediation, and the management of complex downstream dependencies across Microsoft 365, Entra ID, SSO-integrated applications, file shares and legacy systems.

As the programme progresses, several application, access and permissions dependencies have been identified. We are therefore looking for a technically strong contractor who combines deep migration expertise with broad enterprise infrastructure experience.

You will work closely with internal project teams, third-party suppliers and business stakeholders to shape and deliver the remaining phases of the migration programme.

Key responsibilities

• Deliver large-scale Active Directory and identity transformation activities.
• Support the consolidation of multiple AD environments into a single target Active Directory domain.
• Lead and support UPN and primary email address change activities.
• Deliver device domain migrations and user-profile migration activities.
• Identify, assess and remediate permissions, access and application dependencies.
• Support hybrid identity integration across Active Directory, Microsoft 365 and Entra ID.
• Work with SSO-integrated applications, file shares and legacy systems to manage migration impacts.
• Collaborate with technical teams, suppliers and stakeholders to ensure a controlled, successful migration.

Essential experience

• Proven experience delivering large-scale Active Directory and identity transformation projects.
• Strong hands-on experience with Quest migration tooling.
• Demonstrable experience delivering Microsoft Identity and primary email address change programmes.
• Experience with hybrid identity, Microsoft 365 and Entra ID.
• Experience of AD domain migrations, device migrations and user-profile migrations.
• Strong understanding of permissions remediation, access management and application dependency mapping.
• Experience managing migration impacts across SSO-integrated applications, file shares and legacy systems.
• Ability to operate effectively in a complex enterprise environment with multiple stakeholders and suppliers.

This is an immediate-start opportunity for a senior technical contractor who can bring both strategic insight and hands-on delivery capability to a critical identity migration programm