Mark D. Whitley

President and Chief Executive Officer

Mark Whitley has over 40 years of experience in oil and gas engineering and operations. He has been actively involved in the shale development in the United States over the last 20 years. Mr. Whitley has led teams that were instrumental in developing techniques to economically develop the Barnett Shale in North Texas and the Marcellus Shale in the Appalachian Basin. Most recently, he was Senior Vice President of Range Resources in Fort Worth, Texas from 2005-2012. There he led the development of the Marcellus and put together Range’s entrance into the Barnett Shale. Prior to his time with Range, Mr. Whitley served as Vice President, Operations for Quicksilver Resources where he assembled the team to begin Quicksilver’s work in the Barnett Shale. From 1997 to 2002, Mr. Whitley served as Vice President and General Manager for Mitchell Energy in North Texas leading the team that developed the completion stimulation techniques that unlocked the shale gas potential of the Barnett Shale. He held a similar position with Devon Energy after the acquisition of Mitchell. While at Mitchell, Mr. Whitley served in other operation and engineering roles from 1982 to 1997. Prior to this, he held production and reservoir engineering positions with Shell Oil from 1975 to 1982. Mr. Whitley holds a BS in Chemical Engineering from Worcester Polytechnic Institute and a MS in Chemical Engineering from the University of Kentucky. He serves as a member of the Board of Directors of Rubicon Oilfield International. He has served as an advisor to Warburg Pincus over the last two years.