Rolls-Royce North America  Rolls-Royce North America, Inc. is a subsidiary of Rolls-Royce plc involved principally with providing management direction and corporate support for all Rolls-Royce businesses and operations in North America, encompassing more than 7,000 employees at 66 locations across the U.S. and Canada. Their headquarters are currently in Reston, Virginia after a move from nearby Chantilly, Virginia. The most significant part of Rolls-Royce North America is Rolls-Royce Corporation, formerly the Allison Engine Company. Other subsidiaries include:  The Allison Advanced Development Company (also known as LibertyWorks) was established in 1995 as a result of Rolls-Royce plc's acquisition of the Allison Engine Company. As well as establishing a proxy board for Allison, Rolls-Royce was required to vest Allison's classified projects in Allison Advanced Development Company. In 2005, Rolls-Royce changed the name to Rolls-Royce North American Technologies.