Mr. Mueller joined SM Energy in September 2007 as senior vice president. He was appointed the regional manager of the Rocky Mountain Region effective January 1, 2008.
From September 2006 to September 2007, he was vice president and general manager at Samson Exploration Ltd., an oil and gas exploration and production company that was a subsidiary of Samson Investment Company, in Calgary, Canada. His responsibilities included fiscal performance, reserves, and all operational functions of the company. From April 2005 until the company sale in August 2006, Mr. Mueller was vice president and general manager responsible for all business units and the eventual sale of the company for Samson Canada Ltd., an oil and gas exploration and production company that was a subsidiary of Samson Investment Company. He joined Samson Canada Ltd. as project manager in May 2003 to build a new basin-centered gas business unit. He was vice president from December 2003 to August 2006.
Prior to joining Samson, Mr. Mueller was west-central Alberta engineering manager for Northrock Resources Ltd., a Canadian oil and gas company, a wholly owned subsidiary of Unocal Corporation, Calgary, Canada. From 1986 to 2003, he held positions of increasing responsibility in engineering and management for UNOCAL throughout North America and Southeast Asia.