Clariant has appointed John Clarke head of region for the pigments and additives division in North America. Mr. Clarke joined Clariant in 1984 in Ireland and has since gained experience with several of the company’s divisions. For the past four years, he has been head of Masterbatches’ NAFTA region. He also served as vice president and general manager for the U.S. midwest region and head of Masterbatches’ operations in the British Isles. Mr. Clarke holds a master’s degree and has also received several other diplomas and certificates.