Schlumberger is the largest energy services company in the world supplying technology, project management and information solutions aimed at optimising performance for customers in the international oil and gas industry. The group operates through two primary business segments: Schlumberger Oilfield Services, which supplies a wide range of products and services to the international oil and gas industry; and WesternGeco, jointly owned with Baker Hughes, is the world's largest surface seismic company. The group employs over 50,000 people in 100 countries worldwide.