Dipl. Phys. Oussama Chehab obtained his Dipolma degree in physics at the university of Düsseldof. in 1980 .Reasurch assistant at the university of Düsseldorf( 1980-1981). Production , sales and marketing manager for solar photovoltaics working for the company BMC ( 1981-1986). Since 1987 he is Sales and marketing manager for photovoltaic integration into building and solar glass , vice president in Pilkington Solar International GmbH and since 2000 Director of the Profit Center Photovoltaics of FLABEG Solar International GmbH former Pilkington Solar International. He is author and co-author of more than 20 publications in the Photovoltaics fields including conference papers. He was responsble for the First photovoltaic application as integration into building and is since then responsible for the realization of more than 250 projects in Europe and worldwide.