Signa Holding, which acquired a 75 percent interest in Karstadt Sports last September, has appointed a new chief financial and operating officer for the chain, Michael Krauledat, to work with its chief executive, Simon Rider. The financial matters were previously handled by Miguel Müllenbach, who continues as finance manager of the eponymous department store chain, Karstadt Warenhaus. Krauledat has been previously in charge of finance management for Primera, a subsidiary of Escada, and for Basler.