Data migration failures can delay go-live, compromise data integrity, and erode trust in new systems. Complex transformations and high volumes make manual checks slow and unreliable.

We help reduce that risk with expert analysis and automated testing designed for complex system implementations. Our approach validates data accuracy, transformation logic, and completeness — so you can migrate with speed and confidence.

Key benefits

Reduced risk through early issue detection

Identify data quality, transformation, and mapping issues early to avoid costly rework and protect business continuity at go-live.

Faster delivery with automation and reusable assets

Accelerate migration timelines using test automation, specification by example, and portable validation assets tailored to your data environment.

Confidence in data integrity and process accuracy

Ensure migrated data is complete, transformed correctly, and ready for use in finance, HR, and operational systems – with validation aligned to business logic.

Core capabilities

Data migration testing

Verifying accurate data transfer and transformation from legacy to target systems.

ETL process validation

Testing high-volume extract, transform, and load operations for rule-based accuracy.

Complex transformation validation

Validating intricate data rules and algorithms during migration with precision.

Automated data validation

Developing scalable test suites to ensure data accuracy post-migration.

Test data management

Designing automated solutions for consistent, reusable pre-production test data.

Testing in large system implementations

We empower your teams through coaching, documentation, and handover for sustainable success.

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.

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 Regression Flex 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

A major government agency

Migrating to Oracle: How Assurity Cloud, QA & Testing helped ensure success.

  • Delivered Oracle Cloud ERP and HR systems resting on a complex implementation with multiple integrations and dependencies.
  • Created multiple test automations which embed Quality Assurance as an ongoing discipline.
  • The agency enjoys predictable quality control, which fits within assigned budgets and timeframes.
Read Case Study

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.


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.

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.

Flexible delivery through cloud-enabled platforms

Assurity Cloud and Assurity Intelligence support on-demand testing, synthetic data generation, and continuous validation – tailored to Agile, Waterfall, or hybrid delivery models.\

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

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