League Data, the centralised CIO and technology partner of Atlantic credit unions for over 50 years, has successfully completed 33 conversions to the Mambu cloud native core banking platform. With only four conversions remaining, League Data and its partners are close to completing what is typically a multi-year transformation for one credit union. Remarkably, they will convert the entire Atlantic credit union system, in just over one year.
Prompted by a legacy core banking system approaching end of life in June 2025, League Data saw this as an opportunity to advance the digital transformation of Atlantic credit unions. The recent accomplishment is a major milestone for the completion of the first large-scale core banking transformation of its kind, in the Canadian financial services industry.
Chad Griffin

Strategic partnerships including industry leaders such as AWS, Mambu, MuleSoft and Persistent have been fundamental to providing the expertise and dedicated support necessary for the modernisation journey of Atlantic credit unions. By choosing to partner with Mambu, a global leader in cloud banking, credit unions benefit from a composable, API-driven architecture that increases flexibility, scalability, and enables faster innovation cycles.
Fernando Zandona
CEO
This conversion initiative falls under League Data’s comprehensive program of services to credit unions that brings together products across core banking, digital services, and cybersecurity under a unified change management approach.
Upon completion of the initiative, League Data will explore opportunities to share their partnership experience, cooperative scale and expertise in banking technology with credit unions beyond the Atlantic region. Credit unions can build their future, together with League Data and learn more about Mambu’s next-generation cloud banking capabilities at the Canadian Credit Union Association (CCUA) National Conference - Waves of Change happening from May 11- 14th, 2025 in Halifax, NS.