Sidley Austin has brought on a corporate partner from Shearman & Sterling, the firm announced this week, the latest hire in a period of growth for the firm’s mergers and acquisitions and private equity practices.

Brien Wassner, based in New York, has joined Sidley as a partner in its M&A and private equity practice. Wassner, most recently a member of Shearman’s M&A practice group, was one of five co-leaders of its private capital industry group. Before Sherman, Wassner also practiced at Milbank, Jones Day, Winston & Strawn and Dewey & LeBoeuf.