2009 - ... crystalsol OÜ. Founder and Member of Management Board
2002 - ... UA University of Applied Sciences Campus Wels, FH Pofessor
1999 - 2001 Johannes Kepler University Linz, Austria
Univ.-Prof. of Physical Chemistry
1995 - 1999 Inst. for Energy Systems Engineering, Research Center Juelich, Germany
Head of Dpt of Electrochemistry
1994 - 1994 Technion, Haifa, Israel
Gust Professor
1993 - 1993 INQUIMAE, Buenos Aires Ülikool, Argentina
Guest Professor
1988 - 1995 Institute for Solar Energy Research, Hannover, Germany
Head of Dpt. of Photoelectrochemistry and New Materials
1987 - 1988 Physical Chemistry Department, University of Hamburg
Ass.-Prof. Physical Chemistry
1986 - 1987 Solar Energy Research Institute, Golden, CO, USA
Guest Scientist