Sean Tully is one of the City of London's most experienced traders. An American, he graduated from the State University of New York in Mathematics as a departmental Scholar and Magna Cum Laude. He went on to do a Master of Science in Mathematics at Clarkson University, and research in Mathematics at the University of Illinois. On leaving academia he joined Citibank, eventually heading up their short-term interest rate derivatives trading desk. Sean was appointed a Managing Director at Citibank in 1996, moving on to run global US interest rate swaps trading, Canadian interest rate derivatives trading and a proprietary trading activity. In 1999, Sean joined WestLB as Managing Director and New York Regional Head of Global Derivatives and Fixed Income, and since 2005 he has had global responsibility for several different trading areas in Derivatives and Fixed Income trading at WestLB in London. Sean is Head of Credit and Fixed Income Trading at WestLB.