Kyle D. Vann

Lead Independent Director

Mr. Vann was appointed to the Board of Directors upon completion of our private equity offering on March 15, 2006 and was appointed Lead Independent Director on May 12, 2016. From 1970 through 1979, Mr. Vann was employed in the refining division of Exxon Company USA, and from 1979 through January 2001, Mr. Vann was employed by Koch Industries. From February 2001 through December 2004, Mr. Vann served as Chief Executive Officer of Entergy — Koch, LP, an energy trading and transportation company. Mr. Vann continues to serve Entergy as a consultant and serves on the board and consults with Texon, LP, a private energy marketing company. On May 8, 2006, Mr. Vann was appointed to the Board of directors of Crosstex Energy, L.P. (now EnLink Midstream Partners, LP), a publicy traded midstream master limited partnership.  From January 2009 through June 2010, Mr. Vann served as an advisory board member for Enexus, LLC, which is a subsidiary of Entergy Corporation.  In October 2012, Mr. Vann joined CCMP Capital Advisors, LLC, a private equity firm, as an Executive Advisor and serves on the boards of portfolio companies Chaparrel Energy, Inc. and Eco Services. Mr. Vann has a Bachelor of Science degree in Chemical Engineering, with honors, from the University of Kansas. Mr. Vann serves on the Board of Advisors for the School of Engineering at the University of Kansas, which selected him to receive its Distinguished Engineering Service Award in 2012.