Ross Duke

CITGO Petroleum Corp. engages in refining, transporting, and marketing of transportation fuels, lubricants, and petrochemicals products. It offers retail gasoline, diesel fuel, jet fuel, lubricants, petrochemicals, and other petroleum-based industrial products. The company was founded by Henry L. Doherty in 1910 and is headquartered in Houston, TX.

Part of Precision Drilling Corp., Grey Wolf International, Inc. is an American company.

Bayard Drilling Technologies, Inc. engages in the provision of land drilling services. The company was founded on December 13, 1996 and is headquartered in Oklahoma City, OK.

Wiltel Communications Group, Inc. provides customized communications solutions to enterprises, and federal government. The company was founded by Robert D. Williams and is headquartered in Tulsa, OK.

Helmerich & Payne International Drilling Co. drills oil and gas wells. It operates as a contract drilling company, owns land rigs, platform rigs located in the Gulf of Mexico and other International rigs. The company was founded in 1967 and is headquartered in Tulsa, OK.

Arthur Andersen LLP used to provide accounting services. It was also into consulting services for clients that operate businesses throughout the United States and around the world. Arthur Andersen was founded in 1913 and was headquartered in Chicago, IL.

Jefferies Financial Group, Inc. (Investment Management) (Jefferies-IM) is the asset management division of Jefferies Financial Group, Inc. (NYSE: JEF), a diversified financial services company headquartered in New York City. The firm was founded in 1968 as Talcott National Corp. and became Leucadia National Corp. in 1980. They change their name into Jefferies Financial Group in 2018. Jefferies-IM offers predominantly institutional clients an innovative range of investment strategies through its affiliated asset managers.

InMoment, Inc. engages in the provision of enterprise feedback management software solutions. It offers mobile application that allows ground-level managers at retail outlets and calls centers to immediately access, view, track and take action on customer survey information. It also offers marketing, human resources, data analyst, operations, and professional solutions. The firm serves the automotive, financial and food services, healthcare, retail, technology and B2B, travel, and utilities industry. The company was founded by John R. Sperry and Kurtis G. Williams in 2002 and is headquartered in South Jordan, UT.

Peterson Partners LLC (Peterson Partners) is a private equity firm founded in 1995 by Joel Peterson. The firm is headquartered in Salt Lake City, Utah.

American Petroleum Institute (API) is the only national trade association that represents all aspects of America's oil and natural gas industry. Its more than 400 corporate members, from the largest major oil company to the smallest of independents, come from all segments of the industry. They are producers, refiners, suppliers, pipeline operators and marine transporters, as well as service and supply companies that support all segments of the industry.

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.