Cyber Security District · 2026-04-14 · 59 min
Title: Securing the World´s biggest HR Firm | Martijn Nykerk, CISO at Randstad | Cyber Security District Episode Description: What does it take to secure a company that manages the careers of millions of people across the globe? In this episode of Cyber Security District , we sit down with Martijn Nykerk, CISO at Randstad, one of the world’s largest HR and recruitment firms, with over 6,000 branches across 38 countries. Martijn has spent 20 years inside Randstad, growing from running the Dutch telco infrastructure to becoming its first global CISO, building security from the ground up as the company transformed from a federation of local operators into a true multinational. With an engineering background forged on North Sea gas platforms, Martijn brings a rare perspective to the CISO role: the ability to zoom in and out across technical, process, organizational, and business layers simultaneously. In this conversation, he breaks down what that actually looks like in practice, why social skills matter more than most security professionals think and how to build a security function that people want to work with.
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