By David Reed, UT EditorGeneva, Switzerland-Joop Koster, currently senior business manager for silicone additives with GE Advanced Materials, Silicones, is celebrating a quarter century of service with the firm and its predecessors.He joined Union Carbide Corp. in October 1980, at its then-headquarters in Geneva, with responsibilities for the firm's pioneering range of materials, most of which are sold under the Niax tradename. He soon established himself as 'Mr Niax' for the European, African, Middle East and Indian Sub-continental PU marketplaces, a role which he continues to play, despite several changes in employer along the line."