Dresdner Kleinwort Wasserstein (DrKW) has hired Simon Cose as a director and head of oil options trading. He joins from Calyon in London where he was head options trader within the bank's energy group. Prior to joining Calyon he worked at Macquarie Bank where he was director of the energy markets group. He will be based in London and report to Martin Fraenkel, global head of commodities.