Katadyn North America has appointed Teresa Coryell House as global head of digital, based in the U.S. and working together with the company's head office in Zurich. She boasts 20 years of experience in digital marketing with companies such as Yoplait and Halo Top Ice Cream. While working for Yoplait, she built up a community of one million fans for the French yoghurt brand on Facebook in eight months' time.