Don E. Charbula

Lonquist & Co. LLC provides petroleum and engineering consulting services. It offers reservoir, economic evaluations, underground storage, disposal well design, regulatory filings and testimony services. The company was founded by Richard R. Lonquist in September 2005 and is headquartered in Austin, TX.

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.

Texas American Resources Co. LLC operates as an independent oil & gas exploration and production company. It operates assets located in Atascosa, Dimmit, Frio, La Salle, and Zavala Counties. The firm specializes in geology, engineering, finance, and land. The company was founded by David E. Honeycutt in 1990 and is headquartered in Austin, TX.

Tri-Union Development Corp. provides oil and gas field exploration services. It acquires, develops, explores and produces oil and natural gas properties in core areas. The company is headquartered in Metairie, LA.

Maxus Energy Corp. explores and produces oil and gas products. It has operations in the United States, Indonesia, and Ecuador. The company was founded in 1983 and is headquartered in Houston, TX.

Part of Chevron Corp., Rutherford-Moran Oil Corp. is a company that explores, develops, and produces crude oil and natural gas. The company is based in Houston, TX. Rutherford-Moran Oil was acquired by Chevron Corp. on March 17, 1999 for $96.12 million.

Part of Hunt Petroleum, Inc., Columbia Gas Development Corp. is an oil and gas exploration company. The company is based in Houston, TX. Columbia Gas Development was acquired by Hunt Petroleum, Inc. from Columbia Energy Group on May 20, 1996 for $200 million.