Dresdner Kleinwort Wasserstein has hired Chris Koppenheffer, former U.S. dollar swaps trader at RBS Greenwich Capital, to head the firm's U.S. dollar swaps trading desk in New York. Koppenheffer said he is excited by the new role and hopes to expand the desk's business. Since Koppenheffer departed RBS Greenwich earlier this year the firm has hired two ABN AMRO professionals for similar roles, according to Doug Greenig, managing director and head of derivative products and agency mortgage trading in Greenwich, Conn. Steven Mullaney joined to head the U.S. dollar swaps trading activity and Bart Sokol is a U.S. dollar swap trader.