Lecturer at the Department of Continuing Studies of Duke University, Durham, NC, a certified Mentor at SCORE-Chapel Hill, NC (Service Corps of Retired Executives), an advisor to the Dean of the School of Business at the Universidad Francisco Marroquin (UFM) in Guatemala City, Guatemala, and a International Management Consultant. While living in Guatemala up to 2006, he worked at the United Nations-sponsored Central American Research Institute for Industry as Assistant to the Director and Head of the Industrial Economics Division, and at the Central American Export Promotion Program.

He was the founder of the Business School and Professor of the Universidad Rafael Landivar in Guatemala City served as President and member of the Board of the American School of Guatemala, the Guatemala Educational Foundation, and various other organizations serving the Guatemalan community. Stephan is fluent in Spanish, English, and German, besides this, he has done a lot of work, as an entrepreneur and businessman.