Wilson Groen

Mobil Corp. operates primarily in the petroleum industry. The company is headquartered in The Woodlands, TX.

Unocal Corp. explores, develops, produces, and markets crude oil and natural gas. The firm also produces geothermal energy in Indonesia and the Philippines and makes petroleum coke, graphite's and silicon carbide materials. The company was founded on October 17, 1890 and is headquartered in El Segundo, CA.

Heartland Oil & Gas Corp. is engaged in the exploration, development and acquisition of oil and natural gas. The company's efforts are directed toward coal bed methane and shale gas. It has 27 wells in four pilots including 24 coal bed methane wells that are currently dewatering and venting gas and 3 saltwater disposal wells. Heartland Oil & Gas was founded in July 9, 1998 and is headquartered in Jacksboro, TX.

Arco Ltd. supplies safety equipment, clothing, footwear, gloves, and maintenance supplies. Its products include careerwear, casual workwear, food industry workwear, hazard protection, weatherwear, workwear, factory equipment, personal protection, and hygiene products. The company was founded in 1884 and is headquartered in Hull, GB.

Part of Goldline Capital Ltd., PT Balikpapan Oil Terminal builds and operates oil storage facilities.

The Geological Society of London is the oldest geological society in the world, founded in 1807, and provides professional, educational, and scientific support to almost 12,000 members worldwide. The Society has a Publishing House based in Bath, which produces the Society’s journals, and a successful book-publishing program. The Society is based in Burlington House, Piccadilly, and shares a courtyard with several other scientific societies as well as the Royal Academy of Arts, placing it at the center of an important meeting place for the arts and sciences. The Society sponsors over 100 conferences a year, covering all aspects of geoscience, and has a network of specialist groups and joint associations, as well as regional groups across the UK.

Part of TotalEnergies SE, Total México SA de CV is a Mexican company that manufactures lubricants.

CEOC (UK) Ltd. specializes in the re-development of mature hydrocarbon reservoirs. The firm focuses on field redevelopment, EOR/IOR and dormant discoveries. The comapny was founded on 15 December 2009 and is headquartered in London, the United Kingdom.

Western Energy Alliance is a nonprofit trade association based in Denver, CO, representing 300 companies engaged in environmentally responsible exploration and production of oil and natural gas in the west. The company believes in the principle of multiple use of non-park, non-wilderness public lands and has consistently stressed the importance of public lands advocacy over many years. The company is an advocacy organization promoting the best practices in the industry.