Rolls-Royce Group plc is a global business providing power systems for use on land, at sea and in the air. The Company has a balanced business portfolio with positions in the civil and defense, aerospace, marine and energy markets. It operates in four segments: Civil aerospace, which is engaged in the development, manufacture, marketing and sales of commercial aero engines and aftermarket services; Defense aerospace, which is engaged in the development, manufacture, marketing and sales of military aero engines and aftermarket services; Marine, which is engaged in the development, manufacture, marketing and sales of marine propulsion systems and aftermarket services, and Energy, which is engaged in the development, manufacture, marketing and sales of power systems for the offshore oil and gas industry, electrical power generation and aftermarket services.