George Kohlrieser
Distinguished Professor of Leadership & Organizational Behavior, IMD | Hostage Negotiator | Bestselling Author of Hostage at the Table & Care to Dare
Former CEO & Chairwoman of Booking.com | Founder of Diversity Hero | Board Member & Investor | Expert in Scaling, Digital Travel & Transformative Leadership
Speaker Gillian Tans scaled Booking.com from an Amsterdam start-up into one of the world's largest digital travel platforms, serving as its first female CEO and later Chairwoman. Founder of Diversity Hero and an active investor and board member, she shows leaders how to grow teams, culture, and revenue together. Audiences gain field-tested insight on scaling, innovation, and inclusive leadership from someone who has done it at global scale.
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Speaker Gillian Tans stands out as one of Europe’s most accomplished business leaders, known for turning bold ideas into global-scale success stories. She began her career in hospitality, studying at the Hotel Management School in Middelburg and gaining hands-on experience with Hershey Entertainment & Resorts in the United States. Those early roles shaped her people-first approach and her focus on operational excellence.
In 2002, she joined Booking.com, then a small but ambitious start-up in Amsterdam. Recognizing the internet’s potential to revolutionize travel, she took on leadership roles across global sales, operations, IT, content, and customer service, consistently driving innovation while protecting the company’s energetic start-up culture.
Her impact accelerated when she became President and Chief Operating Officer in 2011, and later CEO in 2016, the first woman to lead the company. Under her leadership, Booking.com grew into one of the world’s largest digital travel platforms, operating across more than 220 countries and territories.
After stepping down as CEO in 2019, Gillian continued to shape Booking.com’s long-term strategy as Chairwoman. She went on to serve as President of VanMoof, the Dutch e-bike maker, applying her operational expertise to sustainable mobility, and founded Diversity Hero, an initiative advancing diversity, equity, and inclusion across the tech industry.
Today, she advises, invests in, and sits on the boards of several forward-thinking companies, and remains a sought-after voice at leading travel and technology conferences. She speaks English, Dutch, German, and French, reflecting the global mindset that has guided her career.
As a speaker, Gillian Tans ranks among the most compelling leadership speakers for senior audiences, sharing real-world insight on scaling companies, building inclusive cultures, and leading through rapid industry change.
Gillian Tans brings a rare blend of foresight and decisive action to every stage. At Booking.com, she shaped a long-term vision that turned a small start-up into a global travel leader, anticipating industry shifts and building a culture of continuous reinvention. Her keynote reveals how leaders can stay ahead of change, make confident choices, and convert big ideas into scalable results.
Tans guided Booking.com through years of rapid growth and international expansion with exceptional strategic discipline. She understands customer behavior, industry dynamics, and emerging technologies at a deep level, and uses that knowledge to craft strategies that deliver. In this keynote, she breaks down how high-growth companies can spot opportunities, manage uncertainty, and make disciplined decisions that compound into long-term success.
Gillian believes great companies grow from great teams. Throughout her career, she has championed workplaces where people feel empowered, included, and inspired to innovate, building one of the most diverse, high-performing workforces in tech at Booking.com. Her keynote explores how leaders can attract top talent, sustain collaboration at scale, and create environments where individuals thrive and organizations outperform.
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