Member Companies

• Anadarko Petroleum Corporation

• Anderson Engineering Company

• Anschutz Exploration Company

• Berry Petroleum Company

• Big West Oil

• Bill Barrett Corporation

• BP America

• Buys & Associates

• Chevron

• CIMA Energy

• ConocoPhillips

• Devon Energy Corporation

• Dorsey & Whitney

• EnergySolutions

• EOG Resources

• ExxonMobil

• FIML Natural Resources

• Gasco Energy

• Holland & Hart

• Holly Refining & Marketing Company

• Jardine Petroleum Company

• Lear & Lear

• Newfield Rocky Mountains

• O&G Environmental

• Occidental Petroleum Corporation

• Parsons Behle & Latimer

• Petro-Canada Resources

• Petroglyph Energy, Inc.

• Pioneer Natural Resources

• Pioneer Oil and Gas

• Quinex Energy Corporation

• Rain For Rent

• Shell Oil Company

• SilverEagle Refining

• Snell & Wilmer

• Tesoro Refining and Marketing

• True Drilling LLC

• Vancott

• Williams

• Wolverine Gas and Oil

• XTO Energy