Wilmer Cutler Pickering Hale and Dorr LLP, also known as Hale & Dorr and WilmerHale, is an international law firm with offices in the United States, Europe and Asia. It is co-headquartered in Washington, D.C. and Boston. It was formed 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 1,000 attorneys worldwide.