Stefan is President, CEO and founder of Navio Technologies. Prior to Navio, in 1994, Stefan co-founded Brokat Technologies, and served as CEO. Stefan grew Brokat rapidly, and successfully took the company public in 1998 on the German Stock Exchange. In 2001, Brokat was dually listed on the NASDAQ.

At Brokat, Stefan built a five-person startup into one of the world's most respected software companies, with 1,400 employees in 17 countries. At the height of its success, Brokat was a global leader in e-business and m-business technologies.

Stefan has been characterized as an entrepreneur who encourages bold thinking. A committed campaigner for privacy and a workable encryption policy, Stefan has testified before a U.S. presidential advisory council as an expert on encryption. He is active worldwide in fostering m-commerce, and is a popular speaker at business and technology conferences.