Northrop Grumman Marine Systems is a branch of Northrop Grumman Electronic Systems, which is a part of Northrop Grumman Electronic Sensors, a subsidiary of the Northrop Grumman Corporation, which is a worldwide defense company. The company provides an array of products, services and solutions for the systems integration, defense electronics, information technology, advanced aircraft, shipbuilding and space technology markets. Its Newport News sector designs, builds and refuels nuclear-powered aircraft carriers and submarines. The company also performs services for a variety of naval and commercial vessels. The company operates in more than 25 countries throughout the world. It employs a staff of more than 125,000 employees in nearly 10 business divisions. Northrop Grumman Corporation primarily serves the international military, government and commercial industries. Northrop Grumman Marine Systems is located in Sunnyvale, Calif.