Cfo Thought Leader

When Kevin Rubin arrived at Zscaler in May 2025, he joined an established organization following the retirement of the company’s longtime CFO, taking responsibility for continuing the work of a finance leader who had already built a strong foundation. Rubin describes stepping into a business with scale, experienced leadership, and a customer base that included some of the world’s largest enterprises, he tells us.In explaining what Zscaler does, Rubin walks through the company’s core idea: zero trust. Traditional cybersecurity, he says, relied on network-centric “castles and moats,” requiring large amounts of equipment to connect people, applications, and data. Zscaler challenged that model by treating the internet as a “superhighway” and applying a principle of minimal access. If an employee wants to use Salesforce or email, Rubin explains, the system first authenticates the user and then limits access to only what that person is authorized to see, he tells us.Zscaler was founded in 2007 and went public in 20