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Bill Klesse

Chairman of the Board, CEO and President

Bill Klesse serves as the Chief Executive Officer and President of Valero Energy Corporation and Chairman of the Valero Board of Directors. Formerly, Klesse served as Valero’s Executive Vice President and Chief Operating Officer, overseeing all of the company’s refining and marketing operations.

Bill Klesse has been with Valero and the former Ultramar Diamond Shamrock and its predecessors for 40 years.

Early in his career, Klesse held various managerial positions in engineering, petrochemical feedstocks, planning and development and marketing before being named Vice President of Logistics and Strategy in 1982. In 1984, he was named Director of Corporate Development and was subsequently promoted to Senior Vice President, and then, Executive Vice President. After the 1996 merger of Ultramar Corp. and Diamond Shamrock, which formed Ultramar Diamond Shamrock (UDS), Klesse served as Executive Vice President of the company’s refining operations.



In 1999, he was named Executive Vice President of Operations of UDS and became Chairman of the Board of Shamrock Logistics GP, LLC. After Ultramar Diamond Shamrock was acquired by Valero in 2001, Klesse served as Executive Vice President of Refining and Commercial Operations. In 2003, he was named Valero’s Executive Vice President and Chief Operating Officer. And on Jan. 1, 2006, he became the Chief Executive Officer of Valero Energy Corporation and Vice Chairman of the Valero Board of Directors. As of Jan. 19, 2007, he became Chairman of the Valero Board of Directors.



Klesse is a graduate of the University of Dayton, where he earned a Bachelor of Science degree in chemical engineering. He then earned his master’s degree in finance from West Texas A&M University.

Mike Ciskowski

Executive Vice President and Chief Financial Officer

Mike Ciskowski serves as Executive Vice President and Chief Financial Officer with responsibility for Treasury, Finance, Accounting, Internal Audit, Trading Controls and Insurance. He also oversees the company's Retail division, Information Services, and Ultramar, Ltd., the company's Canadian subsidiary.

During his 23 years with the company, Ciskowski has held many different positions in the financial planning and the business and corporate development areas of the company, including Investor Relations Director, Financial Planning Director and Manager of Financial Planning.

While leading the Corporate Development Department, Ciskowski has overseen a string of very successful acquisitions over the last few years, including the purchases of the Paulsboro Refinery, the Benicia Refinery, the Corpus Christi East Refinery, Huntway Refining Co., UDS, and the St. Charles Refinery. He has helped Valero earn a reputation for making very successful acquisitions, conducting smooth transitions and closing those transactions in record time.

Prior to joining Valero, he worked for Williams Exploration Co. and Getty Oil Co. in finance and planning. He earned bachelor’s of business administration and master’s of business administration degrees in finance from Central State University in Oklahoma.

Rich Marcogliese

Executive Vice President and Chief Operating Officer

Rich Marcogliese serves as Executive Vice President and Chief Operating Officer, responsible for the company's refining and commercial operations. Marcogliese previously served as Executive Vice President-Refining Operations.

Prior to that he held the position of Senior Vice President-Strategic Planning for Valero and was responsible for developing the strategic plan for the new Valero.

Before joining Valero’s corporate office, he held the position of Vice President and General Manager of the company’s Benicia Refinery. Prior to Valero’s purchase of the Benicia refinery from ExxonMobil, Marcogliese worked for Exxon for 26 years serving in various operational and technical supervisory positions at the Benicia refinery and at the company’s Baton Rouge refinery, refining and supply headquarters and the former Bayway refinery in New Jersey.

Marcogliese holds a Bachelor of Science degree in chemical engineering from New York University School of Engineering and Science.

Joe Gorder


Executive Vice President-Marketing and Supply

Joe Gorder is Executive Vice President-Marketing and Supply, with responsibility for Crude and Feedstock Supply and Trading, Products Supply and Trading, Optimization Planning and Economics, Wholesale Marketing, International Market Development, Logistics Operations and Development, Commercial Business Development, Transportation, and Specialty Products Marketing. 

Prior to that, he held the position of Senior Vice President-Corporate Development. While in this role he oversaw the acquisition of Premcor Inc., Kaneb Services LLC, Kaneb Pipe Line Partners LP, and the Aruba Refinery. He was also responsible for strategic planning.

Before joining Valero, he held the positions of Vice President of Business Development for Ultramar Diamond Shamrock, and Director of Commercial/Industrial Sales, Assistant Treasurer and Director of Information Systems for Diamond Shamrock.

Gorder earned a bachelor’s degree in business administration from the University of Missouri-St. Louis and a master’s degree in business administration from Our Lady of the Lake University.

Gene Edwards

Executive Vice President-
Corporate Development and
Strategic Planning

Gene Edwards is Executive Vice President-Corporate Development and Strategic Planning. Previously, Edwards served as Senior Vice President-Product Supply and Trading and Wholesale Marketing.

Edwards has been with the company for more than 25 years and has held positions of increasing responsibility as a manager in several areas, including Planning and Economics, Refinery Operations, Business Development, and Marketing.

Prior to joining Valero, Edwards consulted on refinery economics for Pace Consultants. He started his career as a Process Engineer for CITGO. Edwards earned a Bachelor of Science degree in chemical engineering from Tulane University and a Master of Business Administration degree from the University of Texas at San Antonio.

Kim Bowers

Executive Vice President and
General Counsel

Kim Bowers serves as Executive Vice President and General Counsel for Valero Energy Corporation.

She joined Valero in 1997 as Corporate Counsel. In April 2006, Bowers was promoted to Senior Vice President & General Counsel, and promoted to her current position in October 2008. She has served as lead attorney for all of the company's major acquisitions during her tenure with the company. Plus, she managed many legal aspects of Valero's $6 billion acquisition of Ultramar Diamond Shamrock in 2001.

Over the years, Bowers has overseen Valero’s Commercial and Environmental Law departments as well as Litigation, Labor and Ad Valorem Tax. She has also overseen Valero’s Governmental Affairs and Health, Safety and Environmental departments.

Bowers is very active in the San Antonio community, serving as Past Chair of the Board of Family Service Association, one of San Antonio’s oldest and largest non-profit organizations. She also serves on the Board of Trustees and the Executive Committee of the United Way of San Antonio and Bexar County, and chairs the United Way’s Coordinating Council, which oversees United Way’s Targeted Community Impact work as well as general agency funding.

Bowers previously worked for the law firm of Kelly, Hart & Hallman in Fort Worth. A native of Ohio, Bowers earned a Bachelor of Arts degree from Miami University (Ohio), a Master of Arts degree from Baylor University and her Juris Doctorate from the University of Texas School of Law.

Gary Arthur Jr.

Senior Vice President-Retail Marketing

Gary Arthur serves as Senior Vice President of Retail Marketing. He has led numerous initiatives to improve the company’s supply, marketing and transportation business activities since joining Valero in 2000 as Vice President of Marketing, Supply & Transportation. In his current position, Arthur is responsible for Valero’s network of 1,000 company-operated convenience stores as well as the company’s Asphalt, Lube Base Stock, Petroleum Coke and Sulfur marketing activities.

Prior to joining Valero, Arthur worked for Colonial Group as Vice President of Supply and Distribution. He has extensive commercial and managerial experience, working nearly 20 years for Ashland Oil, where he served in a variety of increasingly responsible management positions in Marketing, Supply, Trading, Distribution and Business Operations.

Actively involved in community activities, Arthur has served on the Board of Directors of St. Peter’s/St. Joseph’s Children’s Home and currently serves on the Board and Executive Committee of the San Antonio Sports Foundation. He is active in Bexar County United Way Campaign leadership and serves on the United Way Marketing Advisory Committee.

Arthur holds a bachelor’s degree in business administration from the University of Kentucky and a master’s degree in business administration from Morehead State University. He and his wife, Sheila, live in San Antonio and have two children.

Jay Browning

Senior Vice President-Corporate Law and Secretary

Jay Browning is Senior Vice President-Corporate Law and Secretary with responsibility for Corporate Governance, Finance, Securities and Exchange Commission, and Information Systems Support.

Since he joined Valero in 1993, Browning has provided legal counsel on the company’s numerous transactions, assured compliance with securities laws and provided legal counsel to the board of directors and principal officers.

His prior experience includes positions as an Associate in the Corporate & Securities division of Akin, Gump, Strauss, Hauer & Feld, LLP, in San Antonio, and as an Attorney in the Corporate/Transactional division of Baker & Botts, LLP, in Austin.

Browning earned his Bachelor of Business Administration degree in finance, a Master of Business Administration degree and a Juris Doctorate from Texas Tech University.

Mike Crownover

Senior Vice President-Human Resources

Mike Crownover has served as Valero's Senior Vice President of Human Resources since May 2002. Since joining the company in 1997, he has been an integral part of Valero's leadership team. He has served as Corporate Compensation Manager, Corporate Human Resources Manager, Corporate Human Resources Director, and Executive Director Employee Relations and Retail HR.

Prior to joining Valero, Crownover served as Human Resources Manager for Halliburton Energy Services.

Crownover earned his bachelor's degree in accounting from the University of Texas at Arlington.

During his tenure with Valero Human Resources, the company has consistently been recognized as one of Fortune magazine's "100 Best Companies to Work For," and has been recognized as the No.1 "Best Big Company to Work For."

Clay Killinger

Senior Vice President and Controller

Clay Killinger serves as Senior Vice President and Controller, overseeing the company’s accounting, budgeting, forecasting and profit-planning procedures; financial statements and reporting; and corporate tax functions. Killinger joined Valero in 2001 as Assistant Controller–Budgeting and Forecasting.

Prior to joining Valero, Killinger was a Partner with Arthur Andersen LLP in both San Antonio and Houston, and he held several managerial positions, including leadership of the firm's financial and accounting outsourcing activities in Texas, Louisiana and Colorado. Valero was a primary client of his for nearly 20 years, and throughout the years he conducted extensive audit work for Valero.

Killinger is a Certified Public Accountant and Certified Fraud Examiner. He earned a business administration degree in accounting from the University of Texas at San Antonio (1983), Summa Cum Laude.

Hal Zesch

Senior Vice President and Chief Information Officer

Hal Zesch is Senior Vice President and Chief Information Officer. Zesch also coordinates the integration of Valero’s acquisitions. He is responsible for Valero’s systems, infrastructure, networks, applications and telecommunications. Zesch has more than 30 years of experience with Valero and has held numerous positions within the company’s Accounting and Information Systems divisions.

Most recently, Zesch served as Vice President of SAP Systems Integration with responsibility for the configuration, integration and production support for all of the company's SAP-related systems. He previously served as Vice President of Best Business Practices, Assistant Corporate Controller, Controller for Natural Gas and Natural Gas Liquids Operations, and Director of Corporate Accounting. Before joining Valero, Zesch worked as an audit and consulting manager at Deloitte & Touche, where Valero was one of his clients. Zesch is a Certified Public Accountant and earned his Bachelor of Business Administration degree in accounting from the University of Texas at Austin.

Eric Fisher

Vice President–Investor and Corporate Communications

Eric Fisher serves as Vice President-Investor and Corporate Communications. In his role, Fisher oversees the Investor Relations, Corporate Communications, Community Relations, Advertising and Corporate Sponsorship departments.

Previously, he served as Vice President of Investor Relations, where he developed strong communications programs for Valero investors. These programs were particularly beneficial during Valero's aggressive growth period because they helped investors understand the complexities of deals like Valero's $8 billion purchase of Premcor Inc.

Fisher began his career with Valero in 1997, when he joined Valero’s Corporate Law Department. In 1999, he moved to Investor Relations, and in 2004 was named Vice President of Investor Relations.

Prior to joining Valero, Fisher worked for the law firm of Fulbright & Jaworski. Earlier in his career, he worked as an operations accountant for Exxon Corp. Fisher earned his undergraduate degree in economics from Texas A&M and his Juris Doctorate from the University of Texas School of Law.

Donna Titzman

Vice President and Treasurer

Donna Titzman serves as Vice President and Treasurer and has overall responsibility for the company’s banking, cash management, customer credit and investment management areas. Titzman joined Valero in 1986 as an accountant in the Natural Gas Liquids area.

In 1989, she transferred to the Finance Department and held several positions before being appointed Vice President and Treasurer in 1999. Titzman is a Certified Public Accountant and earned a Bachelor of Business Administration degree in accounting from the University of Texas at Austin.