Och-Ziff Capital Management Group's chief financial officer, Alesia Haas, has resigned from the hedge fund firm to become CFO at cryptocurrency company Coinbase. While Haas has already started her new role, she will be helping Och-Ziff with a transition period through June 1, according to a statement posted April 17 on Coinbase's website. Och-Ziff announced the same day that it hired Thomas Sipp, previously a managing partner at venture firm Magis Partners, to replace her as CFO.