Gillian Tans is CEO of Booking.com, the phenomena… Gillian Tans is CEO of Booking.com, the phenomenally successful hotel reservation platform. Booking is the largest platform of European descent. No other digital European B2C venture expanded on such an impressive global scale. Gillian was employee #7 of Booking and has been at the helm of the company for the past two years. Interviewed by Christoph Keese, Gillian describes Booking's unique management culture and explains how they disrupted the hotel market. They orchestrated a disruption that was overdue since hotels entertained poorly designed booking. sites themselves, offered miserable service and withheld important information. Gillian Tans joined Booking from a large hotel group. Her entrepreneurial success is an inspiring tale speaking to the power of combining industry expertise with disruptive startup knowhow.