Viu has recently appointed Mario Muttenthaler to the new position of chief marketing officer. The fast-growing Swiss retail chain is expanding its management team and aims to shift the focus to its international expansion and brand development. Muttenthaler joined Viu in mid-May. He was previously managing director at Swear, a sneaker label from London. At Viu, he will be responsible for the marketing and communications department, as well as for the development and management of Viu's e-commerce teams. Viu was created in Zurich in 2013. It has recently opened a new store in Bielefeld, Germany, bringing its retail chain to a total of 50 stores. The company employs more than 250 people and sells about 100,000 pairs of glasses per year.