Bruce Witherell joins Freddie Mac (FRE) as chief operating officer, effective September 14. Witherell has served as managing director and global co-head of Morgan Stanley’s (MS) residential mortgage business since 2006. Prior to that, he spent 15 years at Lehman Brothers in a variety of leadership roles, including CEO of Lehman Brothers Bank. In his role at Freddie Mac, Witherell will oversee the integration of the company’s business lines: single-family credit guarantee, multifamily sourcing and investments and capital markets, as well as its operations and technology division. He will report to CEO Charles Haldeman, Jr. Witherell is a graduate of Carnegie Mellon University. Write to Austin Kilgore.