Minisupercomputer builder Alliant Computer Systems Corp, Littleton, Massachusetts, is restructuring its operations in an attempt to expand its foreign business, and has taken on Roger Parsons, formerly president of VMark Software Inc to be vice president of worldwide sales. The company is cutting 40 jobs at its Littleton headquarters, but is taking on another 50 people in international sales and marketing. The OEM pact with Apollo Computer Inc has accounted for most of Alliant’s overseas sales.