1996 and corporate controller in 1999. He became Chief Financial Officer in 2001.

An active community supporter, Nell is a board member of the Community Service Council, YMCA of Greater Tulsa, and a trustee for The Nature Conservancy in Oklahoma. His previous community commitments include serving on the boards of the Jenks Public School Foundation and Street School in Tulsa.

Emmet C. Richards

Managing Member, Core Investment Capital, LLC. Mr. Richards previously served as Executive Vice President and Chief Operating Oficer for Sooner Pipe Corporation (distributor of tubular products worldwide with domestic and international operations), a subsidiary of Oil States International.

Michael C. Turpen

Partner at the law firm of Riggs, Abney, Neal, Turpen, Orbison & Lewis in Oklahoma City, OK. Mr. Turpen previously served as Attorney General for the State of Oklahoma.

R.A. Walker

Mr. Walker, 58, was named Chairman of the Board of the Company in
May 2013, in addition to the role of Chief Executive Officer and director,
both of which he assumed in May 2012, and the role of President, which
he assumed in February 2010. He previously served as Chief Operating
Officer from March 2009 until his appointment as Chief Executive Officer.
He served as Senior Vice President, Finance and Chief Financial Officer
from September 2005 until March 2009. Mr. Walker is a director of the
Houston Branch of the Dallas Federal Reserve. He is also on the Board of
Trustees for the Houston Museum of Natural Science, a member of the
Business Council, the Business Roundtable, All-American Wildcatters, and
serves as a director of the American Petroleum Institute (Executive
Committee) and America’s Natural Gas Alliance (Executive Committee).
In