Data migration testing & quality services for complex systems

Securely modernise legacy systems without compromising speed or privacy. We eliminate the trade-off between realistic testing and data security.

Modernising legacy systems is a high-stakes balancing act. We combine Assurity’s 20+ years of engineering expertise with DataMasque technology to ensure delivery without data risk. Going beyond basic migration, we leverage Behaviour Driven Development (BDD) to validate transformation logic in business-readable language, ensuring faster feedback and complete integrity.

Key benefits

Accelerate delivery without risk

Validate complex integrations early using “synthetically identical” production-like data. Identify defects and prevent costly breaches without security hazards.

Innovate with total confidence

Achieve total privacy compliance by removing Personally Identifiable Information (PII) from non-production environments, eliminating data breach risks while you test.

Gain instant public sector trust

Meet the highest public sector standards using our DIA-vetted accelerators and Assurity Cloud Platform (ACP) for secure, compliant high-stakes integrations.

Core capabilities

Data migration testing

We verify accurate data transfer and transformation from legacy to target systems, ensuring business continuity at go-live.

ETL process validation

Our teams test high-volume extract, transform, and load (ETL) operations for rule-based accuracy, even in high-risk environments.

Complex transformation validation

We validate intricate data rules and algorithms during migration with precision to ensure data remains reliable.

Test Data Management (TDM)

We design automated solutions for consistent, reusable pre-production test data that remains secure and compliant.

The Assurity data quality framework

This cycle ensures that your data is not just “moved,” but actively managed, secured, and validated at every stage of the integration.

  1. Defining data personas: We identify the specific data – from customer details to product info – that is critical to your business outcomes.
  2. Secure provisioning: We leverage masked or synthetic data to mirror real-world needs while maintaining absolute compliance.
  3. Organisation and scalability: We sort and manage data so it remains easy to use across high-volume issuance and redemption flows.
  4. Accuracy validation: We compare test data to original sources to ensure consistency across complex integration layers.
  5. Auditability: We document all test data to provide a clear reference for future vendor upgrades or regional expansions.
  6. Resilience testing: We systematically identify edge cases and handle unexpected errors to keep your systems running smoothly under pressure.

Engagement models

Flexible engagement models to suit your delivery needs.

On-demand talent

Through the Assurity Cloud platform, clients can access scalable testing capabilities like AutomationFlex and PerformanceFlex, including reusable assets for data validation and monitoring.

Project-based delivery

We provide tailored testing services aligned to specific project goals and timelines. This includes full lifecycle support – from requirements and technical testing to data migration validation, UAT, and hypercare.

Managed services

Assurity takes end-to-end responsibility for ongoing testing and quality assurance. We implement continuous testing, maintain automation assets, and deliver measurable outcomes as a long-term partner.

Case studies

Mercury NZ

How QA & testing helped Mercury confidently migrate 300,000 customers

  • Provided Quality Assurance, augmenting Mercury’s test capability for the complex Retail Integration Program.
  • Developed a robust strategy for data migration of 300,000 customers, with minimal impact on CX.
  • Knowledge sharing contributed to the efficiency and the success of the Program.
Read Case Study

Secure innovation in action

Discover how our partnership with DataMasque allows teams to innovate faster, test more effectively, and meet the highest standards of compliance.

Why partner with Assurity?

Proven success in complex data migrations

With 20+ years of experience and 2,000+ engagements, we’ve delivered data migration testing for major ERP, HRIS, and government systems – ensuring accuracy, compliance, and business continuity.

Secure innovation with DataMasque

Our partnership with DataMasque allows for secure data discovery and masking, solving the trade-off between realistic testing and privacy. We provide masked data that behaves exactly like production, ensuring you can innovate rapidly while meeting strict GDPR and Privacy Act requirements.

Deep expertise in high-volume ETL validation

We test complex extract, transform, and load (ETL) processes at scale – validating that data is moved, transformed, and loaded accurately according to business and technical rules, even in high-volume, high-risk environments.

Advanced automation and BDD for transformation validation

We use Behaviour Driven Development (BDD) and custom automation to validate complex transformation logic, enabling faster feedback, reduced manual effort, and higher confidence in data quality.

Government-vetted delivery platforms

Underpinned by the Assurity Cloud Platform (ACP), our accelerators – including AutomationFlex and PerformanceFlex – are DIA and Government vetted. This certification ensures that even for high-stakes public sector projects, there are no challenges regarding data management or compliance.

Reusable test assets for long-term value

Our test suites are designed to be portable and scalable – supporting regression testing, patch validation, and ongoing data integrity monitoring post go-live.

What clients say

“Migrating 300,000 customers along with historical data is a big project. Assurity’s knowledge sharing has helped us accelerate the process.”

Toni Warren

Program Test Manager, Mercury NZ

“Customers need to know that despite the changes in the background, they can have faith in Mercury, with a positive and unimpeded customer experience.”

Robyn Greer

Test Manager – Migration, Mercury NZ

FAQs

Unlike traditional methods that often leave data validation until the end of the build, we employ a “Shift-Left” philosophy. We embed quality assurance from the project’s inception, using a six-step framework that starts with defining data personas and moves through to resilience testing. This ensures hardware, payment systems, and software integrations are validated early, drastically reducing the cost of defects.

Data is often an enterprise’s greatest vulnerability during testing. Our partnership with DataMasque allows us to perform secure data discovery and masking. Instead of using risky production dumps or ineffective “dummy” data, we generate “synthetically identical” data – datasets that retain the statistical and functional characteristics of real data but with all sensitive information irreversibly masked. This allows for realistic stress testing without compromising privacy.

Compliance is baked into our testing environments. By using masked or synthetic data for development and analytics, we ensure that Personally Identifiable Information (PII) never leaves your secure production environment. Furthermore, our underlying Assurity Cloud Platform (ACP) and accelerators are DIA and Government vetted, ensuring strict adherence to public sector compliance standards.

Yes. We specialise in validating complex Extract, Transform, and Load (ETL) operations at enterprise scale. Whether you are modernising a 20-year-old CRM or migrating to a cloud ERP, we verify that data is moved, transformed, and loaded accurately according to your specific business logic, ensuring consistent performance across high-volume issuance and redemption flows.

We are tool-agnostic but solution-focused. While we leverage specific accelerators like Assurity Intelligence and ExMonitoring, our goal is to build an auditable data framework. We document all test data to provide a clear reference for future vendor upgrades, regional expansions, or ongoing regression testing.

Absolutely. Our solution is underpinned by the Assurity Cloud Platform (ACP), which includes vetted accelerators like Performance Flex and Automation Flex. These tools are vetted by the New Zealand Government (DIA), ensuring that even for high-stakes public sector or financial services projects, there are no challenges regarding data management or security compliance.

Insights