When Steve Bunnell left the U.S. Attorney’s Office for the District of Columbia in 2007 to join O’Melveny & Myers, one of his colleagues, Mary Pat Brown, took over as the criminal division chief. Now, five years later, Bunnell and Brown will be reunited.

Brown is joining O’Melveny in October as a partner in the white-collar defense practice. She’s filling a hole created after Kenneth Wainstein — the former U.S. attorney for the District of Columbia — left for Cadwalader, Wickersham & Taft. “One thing for sure, O’Melveny definitely traded up on that deal,” Wainstein said. “Mary Pat’s a star in every way.”