1963 Born in Goeppingen, State of Baden-Wuerttemberg, Germany.

1988 Master in Electrical Engineering and Cybernetics at University of Technology Munich, Germany.

1992 Co-Founder of the Intl. Solar Center Berlin.

1993 Ph.D. (Operation model of PV modules) at Prof. Rolf Hanitsch, University of Technology Berlin, Faculty of Electrical Engineering , Germany

1994 Post-doc studies at Prof. Martin Green at the University of New South Wales.

1995 Visiting Professor at the Federal University of Rio de Janeiro, Brazil

1997 Co-founder of Solon AG, joint-stock company for PV module production, Berlin

2002 Organizer and General Chairman of RIO 02 – World Climate & Energy Event (continuation of that event in 2003, 2005 and 2006, since 2003 together with Latin America Renewable Energy Fair - LAREF) Chairman at the World Council for Renewable Energies (WCRE) - Latin America Section

2003 Visiting Professor at the State University of Ceara, Brazil.

2004 Member of the Board of Directors of the International Solar Energy Society (ISES)

2005 Professor at University of Technology Berlin

1996 Laureate of the Berlin Solar Award

2006 Laureate of the Green Prize of the Americas

2006 Co-Founder & Member of the Board of PI-Berlin (Photovoltaik-Institut Berlin AG)

2008: Professor at University of Applied Sciences Biberach

Since 2010: Professor at Paderborn University