Orrick, Herrington & Sutcliffe’s Houston office, which opened on Jan. 19, is now up to 22 lawyers with the addition of a five-partner group from Morgan Lewis & Bockius and two more partners joining from McGuireWoods.

Carlos Treistman, who is now the office leader of the Orrick Houston office, and partners Bill Parish, Rodrigo Dominguez, Jonathan Ayre and Joe Roger left Morgan Lewis on Feb. 12 and joined Orrick on Feb. 13. Barbara de Marigny also joined Orrick from McGuireWoods’ Houston office, along with David Ronn, who is scheduled to join Orrick on Feb. 17.