Mr. Diaz served as President, Chief Executive Officer and Chairman of the Board of Directors of Mitsubishi Motors North America, Inc. from April 2018 to April 2020 and as General Manager, Performance Optimization Global Marketing and Sales of Mitsubishi Motors Corporation in Tokyo, Japan from July 2017 to April 2018. From April 2013 to July 2017, Mr. Diaz served in a number of roles for Nissan Motor Corporation, including Division Vice President & General Manager – North American Trucks and Light Commercial Vehicles, Sr. Vice President Sales & Marketing and Operations, and Division Vice President, Sales & Marketing and Parts & Service. Mr. Diaz also served in several roles for Fiat Chrysler Automobiles (FCA) from 2004 to April 2013, including President and Chief Executive Officer of the Ram Truck Brand, President and Chief Executive Officer of Chrysler Mexico, Head of National Sales, Regional Managing Director of the Denver Business Center, and Director of Dodge Brand Marketing Communications.

Mr. Diaz currently serves on the board of directors of SiteOne Landscape Supply, Inc. (NYSE: SITE) (f/k/a John Deere Landscapes LLC), Smith & Wesson Brands, Inc. (NASDAQ: SWBI), and Archer Aviation Inc. (NYSE: ACHR). Mr. Diaz received a bachelor’s degree from Texas Lutheran University and an MBA from Central Michigan University. He is also a Director Member of the Latino Corporate Directors Association (LCDA) and a National Association of Corporate Directors (NACD) Board Leadership Fellow.

H. Paulett Eberhart is Chair and CEO of HMS Ventures, a privately held business involved with technology services and the acquisition and management of real estate. Previously, she served as President and CEO of CDI Corp. (NYSE: CDI), a provider of engineering and information technology outsourcing and professional staffing services. She also previously served as President and CEO of Invensys Process Systems Inc., a process automation company, and as an employee of Electronic Data Systems Corporation, an information technology and business process outsourcing company, where she held roles of increasing responsibility, including senior level financial and operating roles.

Eberhart is a Certified Public Accountant and also serves as a director of LPL Financial Holdings, Inc. (NASDAQ: LPLA) and Fluor Corporation (NYSE: FLR).

Kimberly S. Greene serves as Chairman, CEO and President of Southern Company Gas, a subsidiary of Southern Company (NYSE: SO), a leading U.S. energy company serving 9 million electric and gas utility customers in nine states through its subsidiaries.

Prior to that, she was Executive Vice President and Chief Operating Officer of Southern Company and President and Chief Executive Officer of Southern Company Services Inc. Greene began her career at Southern Company in 1991 and held positions of increasing responsibility in the areas of engineering, strategy, finance and wholesale marketing.

In 2007, she joined the Tennessee Valley Authority, where she served as Chief Financial Officer, Executive Vice President of financial services and Chief Risk Officer, as well as Group President for strategy and external relations. Greene was Executive Vice President and Chief Generation Officer of TVA prior to rejoining Southern Company in April 2013.

Deborah P. Majoras is Chief Legal Officer and Secretary of The Procter & Gamble Company (P&G) (NYSE: PG). She joined P&G in 2008 as Senior VIce President and General Counsel. Previously she served as Chair of the Federal Trade Commission from 2004 until 2008.

From 2001 to 2004, Majoras was Deputy Assistant Attorney General in the U.S. Department of Justice, Antitrust Division. She joined the law firm of Jones Day in 1991, where she became a partner in 1999. Majoras serves on the boards of The Christ Hospital Health Network, the Cincinnati Legal Aid Society, Westminster College and the Leadership Council on Legal Diversity. She has served as a member of Valero’s board since 2012.

Eric D. Mullins is Chairman and Chief Executive Officer of Lime Rock Resources. Previously, he was Co-Chief Executive Officer of Lime Rock Resources and jointly led the team since co-founding the Lime Rock Resources strategy in 2005.

Mullins oversees all strategic, financial and operational aspects of the Lime Rock Resources funds. Prior to joining Lime Rock, Mullins served as a Managing Director in the Investment Banking Division of Goldman Sachs where he led numerous financing, structuring and strategic advisory transactions for public and private E&P companies in the division’s Natural Resources Group.

He also serves on the board of directors of ConocoPhillips (NYSE: COP)

Sen. Don Nickles retired as U.S. Senator from Oklahoma in 2005 after serving in the U.S. Senate for 24 years. He also had served in the Oklahoma State Senate for two years.

During his tenure as a U.S. Senator, he was Assistant Republican Leader for six years, Chairman of the Republican Senatorial Committee and Chairman of the Republican Policy Committee. He served as Chairman of the Budget Committee and as a member of the Finance and Energy and Natural Resources Committees.

In 2005, he formed and is the Chairman and Chief Executive Officer of The Nickles Group, a Washington-based consulting and business venture firm. Sen. Nickles also serves on the Board of Trustees of Washington Mutual Investors Fund (AWSHX). He has served as a director of Valero since 2005.

Philip J. Pfeiffer is Of Counsel in the San Antonio office of Norton Rose Fulbright LLP, where he was Partner-in-Charge for 25 years and led the office’s labor and employment practice. Through his more than 40 years with the firm, he has assisted employers in management-union matters, complex civil rights matters, employment discrimination cases, affirmative action compliance, employment torts, alternative dispute resolution, employment contracts and ERISA litigation.

Pfeiffer is a director and past Chairman of the Board of Southwest Research Institute, a nonprofit contract research corporation based in San Antonio. He serves or has served on the boards of many other nonprofit organizations, including the United Way of San Antonio and Bexar County, St. Mary’s University, San Antonio Medical Foundation, Texas Research and Technology Foundation, The Children’s Hospital of San Antonio Foundation, Alamo Area Council of Boy Scouts and the Cancer Therapy and Research Center. He became a Valero director in 2012.

Robert A. Profusek is a partner of the Jones Day law firm, where he chairs the firm’s global mergers and acquisitions practice. His law practice focuses on mergers, acquisitions, takeovers, restructurings and corporate governance matters.

Profusek also is the lead independent director of CTS Corp. (NYSE: CTS), and is a director of Kodiak Sciences Inc., a private clinical stage biopharmaceutical company. He has served as a director of the managing general partner of Valero LP (now known as NuStar Energy LP) from 2001 to 2005. He has served as a director of Valero since 2005.

Randall J. Weisenburger is Managing Member of Mile26 Capital LLC, an investment fund based in Greenwich, Connecticut. He served as Executive Vice President and Chief Financial Officer of Omnicom Group Inc. (NYSE: OMC) from 1998 until September 2014.

Prior to joining Omnicom, he was a founding member of Wasserstein Perella and a former member of the First Boston Corp. While at Wasserstein Perella, Weisenburger specialized in private equity investing and leveraged acquisitions, and in 1993 became President and CEO of the firm’s private equity subsidiary.

His other corporate board service includes Carnival Corp. and Carnival plc (NYSE: CCL), Corsair Gaming Inc. (NASDAQ: CRSR) and MP Materials (NYSE: MP). He also is a member of the Board of Overseers for the Wharton School of Business at the University of Pennsylvania. He has served as a Valero director since 2011.

Rayford Wilkins Jr. is former CEO of Diversified Businesses of AT&T Inc. (NYSE: T), where he was responsible for international investments, AT&T Interactive, AT&T Advertising Solutions, customer information services and the consumer wireless initiative in India. He retired from AT&T at the end of March 2012.

Wilkins held several other leadership positions at AT&T and its predecessor companies, including Group President and CEO of SBC Enterprise Business Services and President and CEO of SBC Pacific Bell. He also serves on the boards of Morgan Stanley (NYSE: MS) and Caterpillar Inc. (NYSE: CAT), and the Advisory Council of the McCombs School of Business at the University of Texas at Austin. He has been a Valero director since 2011.