Rowan Companies plc, founded in 1923 and based in Houston, Texas, is an American S&P 500 company which provides contract oil well drilling services and rigs. Rowan Companies is located at 2800 Post Oak Boulevard, Suite 5450, in Houston, Texas. Thomas P. Burke is President. W. Matt Ralls is Chief Executive Officer. The company operates a fleet of 30 offshore drilling jackup rigs. In North America the company operates offshore in the Gulf of Mexico, and internationally in Trinidad, the Middle East, North Sea, Southeast Asia, and Egypt.