W.M. “Rusty” Rush has served as President of the Company since 1995 and Chief Executive Officer of the Company since 2006.  He has overseen all day-to-day operations of the Company since 2001, when he was named the Company’s Chief Operating Officer.  W.M. “Rusty” Rush served as Vice President and Executive Vice President of the Company from 1990 until November 1995 when he began his service as President of the Company.  W.M. “Rusty” Rush was appointed Chairman of the Board in May 2013.

Thomas A. Akin has served as a director of the Company since August 2004. Mr. Akin worked in the audit department of E&Y from 1976 until 1989 and has served as the director of the audit department of Akin, Doherty, Klein & Feuge, P.C., in San Antonio, Texas since 1991. Throughout his career, Mr. Akin has served as the client service executive responsible for the independent audit of companies registered with the SEC.

William H. Cary was appointed to the Board of Directors of the Company on January 1, 2015. Mr. Cary served as the President and Chief Operating Officer of GE Capital, the financial services unit of the General Electric Company from November 2008 until December 2014 and as a Senior Vice President of General Electric from November 2006 until December 2014. He served as the President of GE Money (Global), a subsidiary of GE Capital, from February 2008 until his promotion to President and Chief Operating Officer of GE Capital in November 2008. Mr. Cary joined General Electric in 1986 as a member of the Financial Management Program and served in a variety of financial positions around the world until his election as Senior Vice President of General Electric in November 2006. He also served as a member of General Electric’s Corporate Executive Council and was a member of the GE Capital board of directors.

Raymond J. Chess has served as a director of the Company since January 2014.  Mr. Chess served as a Global Vehicle Line Executive for General Motors Co. (“GM”), where he was responsible for global, cross functional general management of the GM crossover market segment from 2009 to 2012.  From 2001 to 2009, Mr. Chess was responsible for GM's commercial truck segment.  Mr. Chess joined GM in 1980 and served in varying capacities, including Vehicle Line Executive, Vehicle Line Director, Chief Manufacturing Engineer, and General Superintendent for Manufacturing Engineering.  Mr. Chess is currently the Chairman of the Board of Directors of Workhorse Group Inc., formerly known as AMP Holding Inc., and sits on the advisory board of Productive Research LLC. 

Troy Clarke was appointed to the Board of Directors of the Company on October 14, 2021.  Mr. Clarke served as Chief Executive Officer, President and a member of the Board of Directors of Navistar International Corp. (“Navistar”), a leading manufacturer and solutions provider for the medium- and heavy-duty truck segment, from April 2013 through July 2020 and then served as Executive Chairman from July 2020 through July 2021.  He was Chairman of the Board from February 2017 through July 2021.  Prior to his position as Chief Executive Officer and President, Mr. Clarke served as President and Chief Operating Officer of Navistar from August 2012 to April 2013, President of the Truck and Engine Group of Navistar from June 2012 to August 2012, President of Asia-Pacific Operations of Navistar, Inc. from 2011 to 2012 and as Senior Vice President of Strategic Initiatives from 2010 to 2011.  Prior to joining Navistar, Mr. Clarke held various positions at General Motors Company, including President of General Motors North America from 2006 to 2009 and President of General Motors Asia Pacific from 2003 to 2006.

Dr. Kennon H. Guglielmo was appointed to the Board of Directors of the Company on January 1, 2015. Dr. Guglielmo has served as Chief Technology Officer and as a member of the Board of Directors of Enovation Controls, Inc., a leading global provider of sophisticated digital control systems for gaseous fuel engines and engine-driven equipment, since its inception in June 2014. In 1994, Dr. Guglielmo formed EControls Group, Inc., an affiliate of Enovation Controls, Inc., and began developing engine management systems for the industrial, marine, and heavy-duty engine markets. He has been the President and a member of the Board of Directors of EControls Group, Inc. since its formation. Dr. Guglielmo holds a B.S. in Mechanical Engineering from Texas A&M University, and an M.S. and Ph.D. in Mechanical Engineering from Georgia Institute of Technology.