served on the management committee at ValueAct Capital since 2018. Prior to joining ValueAct Capital in 2005, Mr. Boze was an investment banker at Lehman Brothers, focused on power utilities and technology mergers and acquisitions. Mr. Boze serves as independent board Chair of CBRE Group, Inc., a commercial real estate and investment services firm. From 2009 to 2010, he served on the board of directors of Valeant Pharmaceuticals International.
Mr. Boze has experience in finance, strategy, and mergers and acquisitions, as well as deep knowledge of our business as a Partner and President of the Company's largest stockholder. In addition, Mr. Boze is a CFA charterholder. His service on the board of other significant companies provides the Board with additional perspective on the Company’s operations.
John J. Diez, 49. Director since 2018. Mr. Diez is Chair of the Governance Committee and a member of the Audit Committee and the Finance Committee. Since 2019, Mr. Diez has served as the President of Fleet Management Solutions for Ryder System, Inc., a commercial fleet management and supply chain solutions company. From 2015 to 2019, he was President of Dedicated Transportation Solutions for Ryder. From 2013 to 2014, Mr. Diez was Senior Vice President of Ryder Dedicated, and from 2011 to 2013, he served as Senior Vice President of Asset Management. He served as Senior Vice President, Global Field Finance from 2008 to 2011 and as Vice President and Chief Financial Officer for the Fleet Management Solutions business segment from 2007 to 2008. He joined Ryder as Assistant Controller in 2002. Mr. Diez spent eight years in the audit practice of KPMG LLP prior to joining Ryder. He is a Certified Public Accountant in the state of Florida and a member of the American Institute of CPAs.
Mr. Diez has extensive experience in managing a significant industrial enterprise. In addition, he possesses important skills and experience gained through his service in public accounting. His experience in logistics and supply chain matters provides the Board with key skills relevant to the Company’s operations.
Leldon E. Echols, 64. Director since 2007. Mr. Echols serves as non-executive Chairman of the Board, Chair of the HR Committee, and a member of the Audit Committee, the Governance Committee, and the Finance Committee. He served as Executive Vice President and Chief Financial Officer of Centex Corporation, a residential construction company, from 2000 to 2006, when he retired. Prior to joining Centex, he spent 22 years with Arthur Andersen LLP and served as Managing Partner, Audit Practice for the North Texas, Colorado, and Oklahoma Region from 1997 to 2000. Mr. Echols is a member of the American Institute of Certified Public Accountants and the Texas Society of CPAs. Mr. Echols has been engaged in private investments since 2006. He is a member of the board of directors and Chair of the audit committee of EnLink Midstream Manager, LLC, a company that owns interests in EnLink Midstream, LLC, which is engaged in the gathering, transmission, treating, processing, and marketing of natural gas, natural gas liquids, and crude oil. He is also a member of the board of directors and Chair of the audit committee of HollyFrontier Corporation, an independent petroleum refiner. From 2008 to 2014, Mr. Echols served on the boards of directors of Crosstex Energy, L.P. and Crosstex Energy, Inc., which are predecessors to certain of the EnLink entities. From 2014 to 2019, he was a member of the board of directors of EnLink Midstream GP, LLC, a company that owned interests in EnLink Midstream Partners, LP.
In addition to having gained substantial managerial experience as an executive officer of Centex, Mr. Echols possesses important skills and experience gained through his service in public accounting. His service on the boards of other significant companies provides the Board with additional perspective on the Company’s operations.
Charles W. Matthews, 75. Director since 2010. Mr. Matthews is a member of the Governance Committee and the HR Committee. Beginning in 1971, Mr. Matthews served Exxon Mobil Corporation, one of the leading energy companies in the world, and its predecessor, Exxon Corporation, in several capacities in its legal department, including Vice President and General Counsel from 1995 until his retirement in 2010. Mr. Matthews has been engaged in private law practice since 2010. He is the Lead Director of Cullen/Frost Bankers, Inc., a financial holding company and bank holding company, and has been a member of the audit committee since 2017. From 2012 to 2016, he was a member of the board of directors of Forestar Group Inc., a real estate and natural resources company.
During his long employment at Exxon Mobil Corporation, Mr. Matthews accumulated broad experience in legal, managerial, and other matters in the energy industry around the world. His service on the board of other significant companies provides the Board with additional perspective on the Company’s operations.
E. Jean Savage, 56. Director since 2018. Ms. Savage has served as Chief Executive Officer and President of the Company since February 2020. From 2017 until her retirement in February 2020, Ms. Savage served as Vice President