Ralph F. Cox

Abraxas Petroleum Corp. engages in the acquisition, exploration, development, and production of crude oil and natural gas. It focuses primarily on the development of conventional and unconventional resources in its primary operating areas in the Rocky Mountains, South Texas, Powder River Basin, and Permian Basin. The company was founded by Robert L.G. Watson in 1977 and is headquartered in San Antonio, TX.

Atlantic Richfield Co. provides oil and gas extraction and production services . The firm's exploration and production operations are focused primarily in the Gulf of Mexico and the midcontinent in the United States, the United Kingdom North Sea, Indonesia, China and Algeria. The company was incorporated on April 15, 1985 and is headquartered in Warrenville, IL.

Part of Occidental Petroleum Corp., Union Pacific Resources, Inc. is a private company that is involved in railroads, gas, and oil production. The company is based in Bethlehem, PA.

CH2M HILL Cos. Ltd. provides consulting, design, design-build, operations and program management services. The company offers its services to the government, civil, industrial and energy clients. Its work is concentrated in the areas of water, transportation, environmental, energy, facilities and resources. The company was founded by Holly A. Cornell, James Howland, Burke Hayes and Fred Merryfield in 1946 and is headquartered in Englewood, CO.

E-T Energy Ltd. develops, operates, produces, and sells recoverable bitumen extraction from the oil sands. It uses the electro-thermal dynamic stripping process for the in situ production of bitumen from oil sands deposits, which is an electro-thermal process that couples electrical heating with heat transfer by convection and conduction, using a drilled grid of electrode and extraction wells. The company was founded by Bruce C.W. McGee and George T. Stapleton II on July 26, 2004 and is headquartered in Calgary, Canada.

Abraxas Energy Partners LP explores crude oil and natural gas. It focuses on crude oil and natural gas exploration, development and production. The firm owns properties in the Gulf Coast Basin of South Texas and the Delaware Basin of West Texas. The company is headquartered in San Antonio, TX.

Part of Pioneer Natural Resources Co., Greenhill Petroleum Corp explores for and produces oil. Greenhill Petroleum was acquired by Mesa, Inc. from Alumina Ltd. on April 17, 1997 for $267 million.

World Gtl Trinidad, Inc. builds, operates, and produces gas-to-liquid facilities that convert natural gas and hydrocarbons into fuels. It also offers LPG, naphtha and diesel for space heating, petrochemical feedstock, road transport and air transport applications. The company is headquartered in New York, NY.