R/GA appointed Nathan Cooper as executive creative director of its London office. ... Euro RSCG Chicago added SVP/group creative director, John Rausch, to its Sprint account. In addition, the agency has promoted Anders Da Silva to creative director on Sprint, Merrideth Kalil from copywriter to associate creative director on Cabot, Powershares and new business. ... Digital branding agency Brand New World promoted Brian Brown to creative director, where he will oversee all of the agency's creative work. ... New York-based Bluerock hired former R/GA exec Eleanor Tsang to fill the new position of director of interactive. ... New York creative digital studio rhinofx appointed Maggie Klein of Maggie Klein & Company to East coast sales associate. ... Greg Verdino and Steve Coulson joined crayon, the new digital marketing firm run by blogger/author Joseph Jaffe, as chief strategy officer and chief creative officer, respectively.