Rolls-Royce North America is a subsidiary of Rolls-Royce. The American unit operates under a Special Security Arrangement which allows it to work independently on some of the most sensitive United States defense programs despite its foreign ownership. It is 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 United States and Canada. Its headquarters are in Reston, Virginia.