Tengasco Management


Michael J. Rugen

Chief Financial Officer/Interim CEO

Michael J. Rugen was named Tengasco Chief Financial Officer in September 2009 and interim Chief Executive Officer in June 2013. He is a certified public accountant (Texas) with over 30 years E&P and oilfield service experience. Prior to joining to Tengasco, Mr. Rugen spent 2 years as VP of Accounting and Finance for Nighthawk Oilfield Services. From 2001 to June 2007, he was a Manager/Sr. Manager with UHY Advisors, primarily responsible for managing internal audit and Sarbanes-Oxley 404 engagements for various oil and gas clients. Prior to joining UHY, Mr. Rugen spent two years as a consultant with Jefferson Wells working with E&P and oilfield service clients. From 1982 to 1998, Mr. Rugen held various accounting and management positions at BHP Petroleum, with accounting responsibilities for onshore and offshore US operations as well as operations in Trinidad and Bolivia. Mr. Rugen earned a B.S. in Accounting in 1982 from Indiana University.



Cary V. Sorensen

Vice President, General Counsel and Corporate Secretary

Cary V. Sorensen is a graduate of the University of Texas School of Law, and he also holds a degree from North Texas State University and a master’s degree from Catholic University in Washington D.C. From 1977 until joining Tengasco in July 1999, he was engaged in the practice of law in Houston, Texas concentrating in the energy industry. He worked in private law firms and as senior counsel–litigation in the corporate law department of a Fortune 100 energy company. He has represented virtually all of the major energy companies headquartered in Houston, as well as local distribution companies and electric utilities in a variety of litigated and administrative cases before state and federal courts and agencies in eight states. He has transactional and litigation experience involving gas contracts; gas marketing; exploration and production of oil and gas including royalties, leasing or operating interests; land titles; oil and gas pipeline operations; and pipeline tariff matters at the state and federal levels. Since joining Tengasco, he has overseen both corporate governance matters required of the Company under recent securities laws and all legal functions relating to the Company’s operations. In addition, he has served as president of Manufactured Methane Corporation, including in the development of the patented process used in extracting methane from landfill gas.



Keith Karlin

Kansas Operations Manager

Keith A Karlin has been with Tengasco since 2008.  He became the Drilling Supervisor in 2012 and was promoted to Kansas Operations Manager in 2018.  He received his certificate in Business Management from NCKTC in 1995.  His career began in the oil industry in the early 1980’s at the ground level working and operating service and completion units. He was employed as a down-hole Pump Repairman for several years before taking on contract pumping duties for independent oil companies.  Keith had also spent ten years as an Electronic Technician installing and servicing communication and data equipment during the down turn in the late 1990’s.  His duties include overseeing the daily business and production activities in Kansas.