Charles R. Brown

Society of Petroleum Engineers, Inc. provides petroleum engineering services. The non-profit company is based in Allen, TX and has subsidiaries in United States, India and Canada.

Part of Noble Corp. Plc, Triton Engineering Services Co. LLC is a petroleum engineering concern. The company is based in Houston, TX. Triton Engineering Services Co. was acquired by Noble Holding Corp. Plc on April 27, 1994.

Marathon Oil Co. explores, transports and markets crude oil, and natural gas. It focuses on oil and gas exploration and production in Angola, Canada, Equatorial Guinea, Norway, the UK and the US. The company was founded by Henry M. Ernst in 1886 and is headquartered in Houston, TX

Hamilton Engineering, Inc. by combining the technical and project management skills of its consultants with its experienced staff and proprietary assignment matching database, it efficiently and effectively provide world-class engineering, consulting, project management, and placement solutions to its upstream clients. The company specializes in providing consultants for the planning and supervision of petroleum related drilling, completion, and well workovers in nearly every oil producing state in the United States and over twenty foreign countries.