Gneuss Inc., Matthews, NC, the North American subsidiary of German machinery manufacturer Gneuss Kunststofftechnik GmbH, has added new staff to meet the needs of its expanding business in North America. Roger Clarke joined the company as sales engineer for screen changers and polymer filtration systems. His territory will be Michigan, Ohio, Kentucky, West Virginia and Pennsylvania. Recently Mr. Clarke was employed by Davis Standard. He brings more than twenty years of experience in the plastics industry to Gneuss from his previous employments with HPM and PTI.