Ariel Lemelson

Ariel is a seasoned cybersecurity executive with 20 years of specialized experience and extensive domain knowledge in cybersecurity. Currently, he serves as the Global Director of Cyber Defense at Booking.com and the entire Booking Holdings Group, one of the world’s leading travel e-commerce companies. In this role, Ariel oversees a team of over 70 security professionals, managing the cyber defense program across multiple brands worldwide.

His previous experience includes senior roles at Dell (EMC) Cyber Innovation Group, ObserveIT (currently Proofpoint), and EY. Ariel brings a unique blend of business acumen and technical expertise, having worked with government agencies and led product management to ideate and build security products from the vendor side.

Ariel is also an active advisory board member for cybersecurity startups, a public speaker, and an investor in a CISO syndicate.