TrueNorth®
M365 Migration Engineer - Active SC needed
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Microsoft 365 Migration Engineer
£425 per day inside IR35
3 month initial contract
Remote with a visit to Newcastle, Leeds or London once every 2 weeks (your choice of location)
Role Overview
We are looking for an experienced Microsoft 365 Migration Engineer to support a complex user-data and identity transition programme.
Working as part of the technical delivery team, you will carry out high-volume migrations across Exchange Online, email archives, OneDrive and user access. You will be responsible for preparing migration batches, operating the migration platform, completing technical checks and resolving issues arising during cutover.
This is a practical engineering position requiring strong Microsoft 365 knowledge and demonstrable experience delivering enterprise-scale migrations with BitTitan MigrationWiz. You will work alongside technical leadership, project delivery, cyber security and operational support teams to move users securely and with minimal impact on business operations.
Key Responsibilities
Migration Delivery
- Build and manage migration batches within BitTitan MigrationWiz.
- Transfer primary mailboxes and online archive content between Microsoft 365 identities.
- Move OneDrive files and folders into newly provisioned user environments.
- Coordinate the transfer or reapplication of group-controlled permissions and access rights.
- Complete pre-migration, cutover and post-migration checks for each user cohort.
- Confirm that migrated data, mailbox settings and access arrangements are complete and accurate.
- Identify unsuccessful or incomplete migrations and carry out the necessary remediation.
Microsoft 365 Configuration
- Prepare and verify destination accounts, Exchange Online mailboxes and OneDrive environments.
- Establish and test source and destination connections within the migration platform.
- Support the use and refinement of scripts, runbooks and repeatable migration processes.
- Assist with email-address changes, SMTP configuration, forwarding rules and identity switchover.
- Reinstate security-group memberships and access to connected applications where required.
- Ensure technical prerequisites are in place before users enter the migration schedule.
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Testing and Assurance
- Support pilot migrations and early-user rollout phases.
- Run documented migration scenarios and accurately record the results.
- Compare source and destination environments to identify missing or inconsistent data.
- Verify mailbox content, archived email, OneDrive files, permissions and user access following migration.
- Capture evidence demonstrating that each migration has met the agreed completion criteria.
- Feed findings from testing into subsequent migration waves.
Incident Resolution
- Diagnose and resolve issues affecting migration progress or user access.
- Provide technical assistance during account cutover and first-time access to replacement identities.
- Investigate problems involving:
- Exchange Online and archived mail
- OneDrive for Business
- Email routing and delivery
- Microsoft Entra ID identities and authentication
- Security and distribution groups
- Microsoft Teams
- SharePoint Online permissions
- Application access linked to group membership
- Escalate complex platform, security or service issues to the appropriate technical owner.
- Maintain clear records of faults, actions taken and final resolutions.
Cutover and Early-Life Support
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- Provide hands-on engineering coverage during scheduled migration windows.
- Monitor completed migrations and respond quickly to user-impacting issues.
- Manage exceptions, retries and corrective migration activity.
- Support operational teams during the period immediately following each migration wave.
- Help transfer knowledge and outstanding actions into business-as-usual support.
Technical Records and Reporting
- Keep migration trackers, technical logs, configuration records and implementation notes up to date.
- Report progress, risks, blockers and migration exceptions to the Technical Lead.
- Produce evidence of successful completion for migrated users and batches.
- Update technical instructions and support documentation as processes evolve.
- Contribute practical recommendations following pilots and completed migration waves.
Essential Experience
- Strong hands-on engineering experience across Microsoft 365.
- Proven delivery of large-scale migrations using BitTitan MigrationWiz.
- Practical experience migrating Exchange Online mailboxes and archives.
- Experience transferring OneDrive data between identities or tenants.
- Good knowledge of Microsoft Entra ID, user identities, groups and authentication.
- Understanding of mail flow, SMTP addressing and forwarding arrangements.
- Experience validating migrated data and resolving failed or partial migrations.
- Ability to troubleshoot permissions and access across Teams, SharePoint and Microsoft 365 services.
- Experience supporting users and service teams during cutover and post-migration support periods.
- Strong documentation skills and the ability to work within controlled technical procedures.
Please apply for more info.
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