Gillian Tans is a business executive and former CEO of Booking.com, one of the world's largest online travel companies. She joined Booking.com in 2002. During her tenure as CEO, Tans played a significant role in the growth and success of Booking.com, expanding its global presence and leading the company through various challenges and opportunities. Under her leadership, Booking.com experienced substantial growth and became the largest travel company in the world. Tans is known for her expertise in the travel and technology sectors and has been recognized for her contributions to the industry.

She is currently an investor and board member/advisor to many companies.