Executive Management


Marvin Chronister, Interim President, Chief Executive Officer

Mr. Chronister was elected to our Board in March 2011 and appointed by the Board on January 31, 2014, to serve as the company’s Interim President and Chief Executive Officer. Mr. Chronister has over 38 years of experience in the oil and gas industry. Since 2006, he has been an independent investor, energy finance and operations consultant, and owner of Enfield Companies. He was previously a Practice Director with Jefferson Wells and served as a Managing Director with Deloitte & Touche. Mr. Chronister also held prior investment banking positions with Merrill Lynch and Kidder Peabody. His industry experience includes President and Chief Executive Officer of Transwestern, and senior management positions with the Kidde Energy Group and NL Industries. Mr. Chronister most recently served on the board of directors of Sonde Resources Corp. from September 2009 to May 2012, where he held the position of Chairman and Interim Chief Executive Officer from September 2009 until March 2011. He has also served on several public and private company boards, and held leadership positions with numerous industry organizations. Mr. Chronister holds a Bachelor of Business Administration degree from Stephen F. Austin State University, and has attended multiple executive development programs.

Tony Buchanon, Executive Vice President, Chief Operating Officer

Mr. Buchanon was named Executive Vice President and Chief Operating Officer on August 12, 2013. He joined Bonanza Creek in August 2012 as Vice President - Rocky Mountain Engineering, and has been instrumental in providing leadership and experience to Bonanza Creek's expanding horizontal drilling program in the Wattenberg Field in Colorado. He has more than 30 years of experience in exploration and production operations, including reservoir, completion, and production engineering, and unconventional oil and gas exploitation. Immediately prior to joining Bonanza Creek, he served as Production Operations Manager for Noble Energy, Inc., and was part of the Wattenberg Business Unit leadership team that was responsible for developing Noble's Wattenberg assets. Before that, he served in a variety of management level engineering and operations roles for companies such as Rosetta Resources Inc., Trend Exploration Company, Burlington Resources Inc. (now ConocoPhillips), and Mobil Exploration and Production (now ExxonMobil Corporation). He holds a Bachelor of Science in Petroleum Engineering from Marietta College.

Bill Cassidy, Executive Vice President, Chief Financial Officer

Mr. Cassidy joined Bonanza Creek in 2013 to serve as our Executive Vice President and Chief Financial Officer. Most recently, Mr. Cassidy served as the Global Head of Corporate Finance and Treasury for Puma Energy, a midstream and downstream oil company with operations spanning 37 countries and a subsidiary of the commodity trading multinational Trafigura Beheer BV. From 2009-2013, Mr. Cassidy was a Principal at RPA Capital, LLC, an asset management fund focused on commodity producers. He has served as a director of Oasis Petroleum since 2010, and as a director of GasValpo, SA, a Chilean gas distribution company, from 2008 until 2012. From 2008 to 2009, Mr. Cassidy worked as Chief Financial Officer of USDCM, LLC, a Greenwich, Connecticut based drilling fund. From 1995 until 2008, Mr. Cassidy served in a variety of investment banking roles, including Head of Exploration and Production Investment Banking at Barclays Capital, Principal of the Energy and Power Investment Banking division at Banc of America Securities, and Vice President at JPMorgan Chase. He worked as a Geophysicist for Conoco (now ConocoPhillips) from 1989 to 1993. Mr. Cassidy holds a Bachelor of Science in Geology and Math from the National University of Ireland, Cork, a Master of Science in Petroleum Geophysics from the Royal School of Mines, Imperial College, London, and a Master of Business Administration (Finance) from the Wharton School of the University of Pennsylvania.

Chris Humber, Executive Vice President, General Counsel

Mr. Humber joined Bonanza Creek in January 2012. Prior to joining Bonanza Creek, Mr. Humber was a partner with Kendall, Koenig, and Oelsner PC and served as our outside counsel since May 2006. While in private practice, Mr. Humber represented public and private companies and investors in a broad range of corporate and securities matters including mergers, acquisitions, leveraged buy-outs, tender offers, and equity and debt financing. In addition to advising both public and private companies on general corporate matters, Mr. Humber has extensive experience counseling public companies with respect to their reporting obligations under the federal securities laws and stock exchange rules.

Mr. Humber’s previous experience includes corporate and securities law at Arnold & Porter and Hogan & Hartson (now Hogan Lovells). Mr. Humber graduated with high honors from Emory University School of Law. Chris also holds a B.A. in Biology from the University of Colorado at Boulder.