A one-time lieutenant to Saul Steinberg and the former head of merchant banking at Steve Schwarzman and Pete Peterson's Blackstone Group, Silverman most recently served as the CEO of Realogy, the parent company of real estate brokerages Century 21, Coldwell Banker, Sotheby's, and Corcoran. The company was acquired by Leon Black's Apollo Management in 2006 and Silverman stepped down as chief executive in November 2007.