Dr. J. Wittwer is an accomplished international executive manager with a proven track record in international business. He lived and worked in 7 countries on three continents and travelled to over 70 nations.

He lectured at following institutes:

Virginia Commonwealth University (VCU) in Richmond VA, USA

IIHEM International Institute for Higher Education, Rabat, Morocco

University of St. Gallen, HBM Unternehmerschule, in St. Gallen, Switzerland

University of Applied Science, Institute of Tourism, in Lucerne, Switzerland

University of Applied Science, Business Institute, in Lucerne, Switzerland

University of Barcelona, Faculty of Tourism, in Barelcona, Spain

Allianz Management Institute ESMT, Munich, Germany

and held numerous presentations among others in Düsseldorf, Frankfurt, Lisbon, Madrid, Barcelona, Fort Myers, Richmond, Teheran, Zürich, Bern, Lugano.