Deephaven Capital Management, the asset management arm of stock trading firm Knight Capital Group, has hired a portfolio manager for its event-driven investments team.

The hedge fund hired Andrew Greenberg as a senior portfolio manager. He joins from Citadel Investment Group where he spent nine years and most recently served as co-head of its global value group. At Deephaven, Greenberg will manage the event-driven portfolio. He replaces Matthew Halbower, current manager of the event-driven fund, who is set to leave at the end of the month when his contract expires.