Esther works as a lecturer in Sustainable Entrepreneurship at Delft Centre for Entrepreneurship (Delft University of Technology). Esther believes that all business should take sustainability into serious consideration, Her prime focus is on those businesses that have sustainability as their core value. Part of her work is addressing entrepreneurship in developing countries. Sustainable business is not just about generating financial revenues, but also adding social and ecological value. Through entrepreneurship, new technologies are brought to the people who need them most. In order to succeed and foster sustainable development, creative revenue models and a culture-sensitive approach is needed.