Chevron Corp. engages in the provision of administrative, financial management, and technology support for energy and chemical operations. It operates through the Upstream and Downstream segments. The Upstream segment consists of the exploration, development, and production of crude oil and natural gas, the liquefaction, transportation, and regasification associated with liquefied natural gas, the transporting of crude oil by major international oil export pipelines, the processing, transporting, storage, and marketing of natural gas, and a gas-to-liquids plant. The Downstream segment consists of the refining of crude oil into petroleum products, the marketing of crude oil and refined products, the transporting of crude oil and refined products by pipeline, marine vessel, motor equipment, and rail car, and the manufacturing and marketing of commodity petrochemicals and plastics for industrial uses and fuel & lubricant additives. The company was founded in 1906 and is headquartered in San Ramon, CA.