Ariel Lemelson

Background

About Ariel Lemelson

Seasoned cybersecurity executive with 20+ years of experience across enterprise, consulting, government, and cybersecurity product innovation.Currently Chief Information Security Officer (CISO) at dLocal (Nasdaq: DLO), a global fintech enabling payments and payouts in more than 55 emerging markets across Latin America, Africa, Asia, and the Middle East. I lead the company’s global security and resilience agenda - ensuring security not only safeguards operations but also enables growth, builds customer trust, and supports scale in highly regulated, high-growth regions.Previously Global Director of Cyber Defense & Enterprise Security at Booking.com and Booking Holdings Group (Nasdaq: BKNG), where I built and scaled a world-class cybersecurity organization of 100+ professionals. My teams transformed cybersecurity into a group-wide capability across multiple brands, delivering measurable resilience, compliance, and trust at global scale.Earlier in my career, I held senior product leadership roles at leading cybersecurity vendors — building next-generation security solutions that are still in use today. This foundation allows me to bridge deep technical expertise with business-driven strategies, enabling innovation and resilience at enterprise scale.Beyond corporate leadership, I advise venture capital firms, serve on advisory boards, and mentor early-stage cybersecurity founders. I am also a frequent speaker at industry events, helping shape the dialogue around innovation, leadership, and resilience.At the core, I believe success in cybersecurity isn’t just about technology - it’s about people and the trust you build between them.