John Walton named Chief Information Security Officer at Nubank

Nubank appointed John Walton as Chief Information Security Officer, announced in June 2026; day-level precision has not been established from available coverage.

One of the world's largest digital banks by customer count, Nubank operates across Brazil, Mexico, and Colombia under multiple central-bank regimes — a CISO seat where regulatory breadth rivals technical depth.

According to the Nubank newsroom, Walton reports to Eric Young and will lead information security strategy for Nubank. According to the newsroom, Walton will be helping the company continue to protect its customers, operations and platform while supporting its long-term growth agenda.

CSO Online reports that Walton has more than 25 years in engineering and security leadership roles. According to the company, Walton most recently served at Electronic Arts as Deputy Chief Information Security Officer. Before his deputy role at EA, Walton was Vice President, Enterprise Security there, according to the release. The company says Walton worked at Microsoft for more than 16 years before EA, holding senior leadership posts that included Vice President, Security Engineering. According to the release, his experience covers regulated cloud environments, cyber risk governance, global security operations and secure product development.

The company says that as it becomes AI-first and scales globally, the way it builds, operates and protects its platform is being redefined.