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We are seeking an experienced Data Migration Lead to take ownership of complex data migration activities as part of a major systems transformation programme. The successful candidate will be responsible for leading the end-to-end migration of data from multiple legacy systems into a modern target platform, ensuring accuracy, integrity, and full reconciliation across all datasets.
This role requires strong technical expertise in SQL, ETL processes, and data transformation, combined with the ability to work closely with business stakeholders, SMEs, and third-party suppliers to define and deliver migration requirements.
The environment includes large-scale housing, financial, and operational datasets, often originating from multiple legacy systems with varying levels of data quality and structure.
Key Responsibilities
Data Migration Delivery
Lead the full lifecycle of data migration activities from legacy systems to target platforms
Analyse and profile complex datasets across multiple source systems
Design and implement data migration strategies, processes, and execution plans
Develop and maintain data mapping specifications and transformation logic
Ensure alignment with supplier-led migration frameworks and delivery schedules
Data Analysis & Design
Work with SMEs and business users to gather and define data migration requirements
Analyse legacy data structures and define business rules for migration
Contribute to the development of target data models and architecture
Identify gaps, inconsistencies, and structural issues in legacy datasets
ETL & Technical Delivery
Design and implement ETL processes using SQL Server, SSIS, or equivalent tools
Extract, transform, cleanse, and load data from multiple legacy systems
Write and optimise SQL scripts, stored procedures, and data transformation logic
Ensure high performance and scalability of migration processes
Data Quality & Governance
Identify and resolve data quality issues, duplicates, and inconsistencies
Define and enforce data validation and cleansing rules
Ensure all migrated data meets required quality, integrity, and compliance standards
Support GDPR and data protection requirements when handling personal data
Testing & Reconciliation
Lead unit testing, system integration testing (SIT), and user acceptance testing (UAT) of data loads
Produce detailed reconciliation reports comparing legacy vs target systems
Support defect resolution and reprocessing of data loads where required
Ensure full auditability of migration outputs
Stakeholder Engagement
Act as primary interface between business SMEs, technical teams, and suppliers
Facilitate workshops to define data definitions, mapping rules, and migration scope
Communicate complex technical issues in a clear, business-friendly manner
Provide regular progress updates and risk/issue reporting
Key Skills & Experience Required
Essential
Proven experience as a Data Migration Lead or Senior Data Migration Specialist
Strong background in migrating data from legacy systems into enterprise platforms
Advanced knowledge of SQL and relational databases (SQL Server preferred)
Experience with ETL processes and data transformation techniques
Strong experience in data mapping, profiling, and cleansing
Experience working with multiple legacy data sources and complex datasets
Ability to work independently and lead migration workstreams
Strong stakeholder management and SME engagement experience
Desirable
Experience in housing, public sector, or asset management systems
Knowledge of systems such as Capita Open Housing, Dynamics 365, Unit4, SAP
Experience with SSIS, Oracle, DB2, or PostgreSQL
Understanding of financial data structures (GL, AR/AP, fixed assets, tenancy data)
Experience contributing to data architecture and target system design
Personal Attributes
Detail-oriented with a strong focus on data accuracy and integrity
Logical and methodical approach to complex problem solving
Comfortable working in high-pressure, delivery-focused environments
Strong communicator with both technical and non-technical stakeholders
Proactive, self-directed, and solution-focused mindset