Data Migration Engineer

We are supporting a fast-paced transformation programme for an established MSP / ISP that is replacing multiple core platforms, including ITSM, Finance, Billing, Sales, Operations and Monitoring. This role is vital to ensuring accurate, validated data migration across legacy and new systems, including migration from ServiceNow to Halo. We are seeking a hands-on, methodical and self-sufficient individual who has successfully delivered system migrations before — not merely built data pipelines. Key Responsibilities Clean, deduplicate and validate large historical datasets Map legacy data structures to new system models Reconcile record counts and perform field-level validation Identify data that should not be migrated (e.g. obsolete, non-billable) Support test migrations, dry runs, UAT cycles and final cutover Manage incremental loads and controlled re-runs Document mapping decisions and migration logic clearly Collaborate closely with Development and Engineering teams to resolve data issues Support post-migration fixes with minimal business disruption Candidate Profile Proven experience delivering data migration programmes Strong SQL skills and advanced data manipulation capability Experience reconciling high-volume transactional data Exposure to ITSM, Finance or Billing system migrations is highly desirable Comfortable working independently in a fast-paced environment Excellent documentation and validation discipline