Migrating to Composer
Move to Composer with confidence. Combining proven tools, migration expertise and a structured delivery approach, GBST helps organisations transition efficiently with minimal disruption. From targeted migrations to full platform transformations, we deliver secure, auditable and low-risk outcomes.
Our Experience
A proven approach to moving complex platforms onto Composer
GBST's migration service combines specialist expertise, proven tooling and a structured methodology to help organisations transition to Composer with confidence. From discovery and data analysis through to migration rehearsals and cutover events, every stage is designed to reduce risk, maintain operational continuity and provide complete visibility throughout the programme.
Specialist migration expertise
Our specialist migration team brings decades of experience across wealth, pensions and investment platform migrations. Proven processes, governance and delivery controls help ensure migrations are predictable, auditable and aligned to business priorities.
Purpose-built migration tooling
Composer migrations are supported by a dedicated ETLR (Extract, Transform, Load and Reconcile) framework, providing automated processing, comprehensive validation and over 80 reports and reconciliations to help assure data quality throughout the transition.
Reduce risk through controlled delivery
A stage-gated approach, migration rehearsals and structured operational runbooks help identify issues early and provide confidence before every migration event. Cohort-based migration strategies enable risk to be isolated and managed as programmes scale.
Proven at scale
GBST has successfully delivered migrations ranging from thousands to hundreds of thousands of accounts onto Composer from a wide range of platforms. Automated execution, collaborative planning and proven methodologies help organisations modernise with confidence while maintaining customer and operational continuity.
Our Backbone
Proven Migration Methodology
ETLR Migration Framework
Purpose-built Extract, Transform, Load and Reconcile tooling designed to automate migration activities, validation and reconciliation throughout the transition process.
Complex Data Transformation
Support complex source data structures, advanced transformation requirements and large-scale data cleansing activities as part of migration preparation and execution.
Automated Reconciliation & Validation
Comprehensive reporting and reconciliation processes provide visibility of data quality, migration progress and validation outcomes at every stage.
Phased Transition Strategies
Migrate by product, distribution channel, customer cohort or other business-defined groupings, enabling controlled adoption of the target operating model.
Migration Rehearsals & Cutover Management
Structured migration events, rehearsals, operational runbooks and command-centre execution help ensure readiness before every production transition.
Governance, Audit & Controls
Stage-gated approvals, audit trails and embedded quality controls provide transparency, traceability and oversight throughout the migration lifecycle.
Transition principles
Every migration programme is unique, but the fundamentals of a successful transition remain consistent. GBST applies a set of guiding principles that focus on operational readiness, controlled execution and protecting customer outcomes, helping organisations move to Composer with confidence.
Prove the operating model early
Validate the end-to-end operating model from the outset by running real business processes on Composer, rather than proving individual capabilities in isolation. This helps surface operational considerations early and reduces the likelihood of rework later in the programme.
Minimise dual-running complexity
Avoid creating competing systems of record by establishing clear ownership of data, processes and operational responsibilities. Any parallel operation should be tightly controlled, time-bound and designed to simplify reconciliation and oversight.
Isolate risk through phased transition
Transition defined products, customer groups or business areas independently, containing risk within each migration event and providing a repeatable approach that can scale as confidence grows.
Protect customers throughout transition
Maintain operational continuity while minimising the impact of migration activities on customers, ensuring security, compliance and service standards are preserved throughout the programme.
Migration Tool Framework
At the heart of GBST's migration service is a purpose-built ETLR (Extract, Transform, Load and Reconcile) framework designed to support complex platform migrations with control and confidence. The framework automates the extraction, transformation, loading and reconciliation of client data, while providing comprehensive reporting, auditability and validation throughout the migration lifecycle. Configuration-driven and capable of handling complex data transformation and cleansing requirements at scale, it supports repeatable migration execution across multiple environments and go-live events, helping organisations transition to Composer in a controlled, secure and predictable manner.
Ready to transition to Composer with confidence?
Talk to our migration specialists about how we can help you transition to Composer with confidence, control and reduced risk.
