MS 365 Migration Expert

This is a remote position.

We are transitioning our Microsoft 365 environment from a Commercial subscription to a Business tenant and rebuilding identity and access management on top of it.

We need an engineer who has done this before, start to finish, in a live business where downtime is not an option, and who can own the technical execution rather than wait to be handed a plan.

This is hands-on work. You will plan the migration, run it, and stay to make sure the environment is stable, documented, and secure afterward.

• Assess the current Microsoft 365 estate: subscriptions, licensing, domains, and tenant configuration.
  

• Build the migration plan — scope, sequencing, pilot groups, cutover windows, rollback criteria, and communications.
  

• Execute mailbox migration in Exchange Online, including shared mailboxes, distribution groups, and coexistence during transition.
  

• Migrate SharePoint Online, OneDrive for Business, and Teams content with permissions and sharing links preserved.
  

• Manage domain transfer and DNS cutover (MX, SPF, DKIM, Autodiscover) with minimal mail disruption.
  

• Validate data integrity post-migration and drive issue resolution to closure.
  

• Administer on-premises Active Directory: domain controllers, organizational units, Group Policy, DNS, and replication health.
  

• Manage directory synchronization between on-premises AD and Microsoft 365, including UPN alignment and sync error troubleshooting.
  

• Clean up and rationalize the directory — stale accounts, duplicate objects, inconsistent naming, and orphaned groups.
  

• Design and implement a role-based access model across Microsoft 365 workloads.
  

• Manage security groups, distribution lists, Microsoft 365 groups, and Teams membership at scale.
  

• Administer SharePoint Online and OneDrive permissions, external sharing controls, and site governance.
  

• Apply least-privilege principles to administrative roles.
  

• Support access reviews and joiner/mover/leaver processes.
  

• Automate repetitive administration and reporting with PowerShell.
  

• Produce runbooks, architecture diagrams, and as-built documentation.
  

• Provide escalation support to the internal helpdesk and hand over cleanly to BAU operations.
  

• 5+ years administering Microsoft 365 in a production business environment, with at least one full tenant or subscription migration you personally executed.
  

• Strong hands-on Exchange Online experience — mail flow, migration batches, and troubleshooting.
  

• Solid on-premises Active Directory administration: GPO, OU design, DNS, and replication.
  

• Working depth in directory synchronization between on-premises AD and Microsoft 365.
  

• Demonstrated experience designing and enforcing permission models across SharePoint Online, OneDrive, and Teams.
  

• PowerShell scripting for bulk administration and reporting — not just running scripts others wrote.
  

• Practical understanding of DNS and email authentication (SPF, DKIM).
  

• Ability to plan and communicate a cutover to non-technical stakeholders.
  

• Clear written documentation habits.