Wilmer Cutler Pickering Hale an Dorr LLP, which also goes by the shorter market name WilmerHale, is an American law firm with major offices in Washington, Boston and New York and smaller offices in Palo Alto, Baltimore, London, Brussels, Beijing, Berlin, Los Angeles, and Waltham, Massachusetts. It was created in 2004 through the merger of the Boston-based firm Hale and Dorr and the Washington-based firm Wilmer Cutler & Pickering, and employs more than 1,100 attorneys worldwide. As of 2006, it was the 18th largest law firm in the world.