Dan O'Sullivan has followed Ben Welsh out the door at UniCredit, where O’Sullivan was global head of FX trading. The two, who met at Goldman Sachs, have worked together for many years. O’Sullivan was one of Welsh’s first hires, joining the bank in October 2007 from HSBC NY. Market talk is that UniCredit’s decision not to pay bonuses for 2008 was a major reason why the two decided to quit. Well-placed sources say that neither one of the duo has anything firm lined up, but that they are likely to resurface soon. At the time of writing, there was no confirmation from UniCredit about the latest departure.