In 1988 Kees Koolen started his first company. 10 years later, in 1997, Koolen invested in booking.com where he was COO from 2001-2008, CEO until 2011 and Chairman until 2014. In 2012 Kees got involved with Uber.
Koolen supported Uber to expand international outside the US and established the headquarters of Uber International in Amsterdam. Kees Koolen is the only person that completed the Dakar race in every category, in 2017 he was world champion cross country rallies on a quad.
Currently, he is the CEO of Koolen Industries, a smart energy company that wants to facilitate the energy transition and provide clean, affordable, reliable energy available for everyone.