GHK has a seasoned and experienced core team of energy professional at its headquarters in Oklahoma City. The firm’s offices are located in the Waterford office complex at the corner of Pennsylvania Avenue and NW 63rd Street.


GHK Management Team

Robert A. Hefner III, Founder and Chief Executive Officer
Robert, professionally a geologist and geophysicist, graduated in 1957 from the University of Oklahoma. He trained with Phillips Petroleum and worked briefly for his family at The Hefner Company before founding The GHK Company in 1959. Under Robert's guidance, the privately owned GHK Company pioneered deep natural gas exploration in the Anadarko Basin. The firm’s operations led to most of the technological innovation necessary to drill and produce the world’s deepest and highest pressure natural gas wells, including many world records. In the late 1980’s he led the GHK exploration team’s analysis of the geologically and geophysically complex Ouachita fold and thrust belt that in 1997 resulted in the discovery of the Potato Hills Field – at the time one of the largest onshore natural gas discoveries in recent decades. More recently Robert has led GHK to the use of horizontal drilling and completion technologies for the development of tight oil and gas reservoirs in the Anadarko Basin. In the 1970's and 1980's, Robert appeared frequently before Congressional committees testifying on energy matters. He has written and published numerous energy articles and in 2009 his ground-breaking book The Grand Energy Transition was published by John Wiley & Sons. A documentary - The Grand Energy Transition - was released in 2012 and the Chinese edition of The Grand Energy Transition book in 2013. Robert continues his active management role at GHK, as well as serving on the International Council at Harvard’s Belfer Center for Science and International Affairs and Singapore’s International Advisory Panel on Energy. He is a member of the Royal Geographical Society, the American Association of Petroleum Geologists, American Association of Professional Landmen, American Institute of Professional Geologists, Oklahoma Independent Petroleum Association, Society of Exploration Geophysicists and the Society of Independent Professional Earth Scientists. Robert was inducted into the Oklahoma Hall of Fame – the state's highest honor – in November 2010.
James C. Brewer, Director of Hefner Family Office
Jim joined GHK in 1980 as Data Processing Manager, was appointed Controller in 1992, and in 2005 was named Manager of Special Projects. In 2010 he was named General Manager of GHK. Jim oversees the Hefner family interests, managing all non-GHK business, as well as supervising all data processing functions. Jim attended both Northern Oklahoma College and Oklahoma State University from 1964 until 1969 while working for Conoco in computer operations. He then managed several data processing and accounting departments, including four years as supervisor of programming for Texas International Petroleum. Jim is a member of the Oklahoma Independent Petroleum Association.
Eric Casazza, Consulting Geophysicist
Eric joined GHK in July 2003 as chief geophysicist. He received his B.S. degree in geophysical engineering from Montana College of Mineral Science and Technology in 1991. Eric was with Phillips Petroleum Company, now ConocoPhillips, from 1991 to 2003, working domestically and internationally – in Angola, the former Soviet Union, China and in the U.K. North Sea – as a geophysical specialist in both exploration and development, with an emphasis on AVO analysis, forward modeling and inversion, advanced imaging and seismic data processing. Eric is a member of the Society of Exploration Geophysicists, the American Association of Petroleum Geologists and the Geophysical Society of Oklahoma City. In 2011, Eric became a consulting geophysicist for GHK.
Daniel A. Drum, Manager of Trading and Investments, GHK Capital LLC
Dan joined GHK in 2012 as Manager of Trading and Investments. He received his B.S. degree in international politics from Georgetown  University's School of Foreign Service in 1999 and his MBA from Columbia Business School in 2005. Dan was formerly with UBS Investment Bank in New York, where he was an associate director of their oil and gas analytical team, with responsibilities for valuations and financial models, trading recommendations, research notes, and maintaining oil and natural gas forecasting models. Prior to UBS, Dan was vice president of finance with PBT Capital Partners LLC, and an associate in the energy investment banking group with RBC Capital Markets. He holds several FINRA series licenses.
J. Wade Kovash, General Manager
Wade joined GHK in 2011 as Land Manager. He received his B.S. Degree in zoology/biology from the University of Oklahoma in 2002 and his Juris Doctor from Oklahoma City University School of Law in 2007. Wade was previously a Senior Landman with EOG Resources Inc. in Texas, leading many acquisitions and divestitures; he also drafted various types of development agreements and advised on regulatory issues. Prior to EOG, Wade was General Counsel/Landman with The Hodges Companies/Coyote Petroleum in Fort Worth, and a Landman with Brigham Land Management LLC. He is a Member of the American Association of Professional Landmen and the State Bar of Texas.
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