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Executive Team

CITGO Officer Profiles

Rick Esser
Executive Vice President

Rick Esser was named Executive Vice President of CITGO Petroleum Corporation in February 2019. With more than 28 years of refining industry experience, he joined CITGO in 1997, and has served in numerous roles, including General Manager Pricing; General Manager Product Supply, Distribution and Trading; General Manager Crude Supply; Assistant Vice President Supply & Marketing; Vice President of Supply & Marketing; and most recently as Vice President of Compliance and Chief Strategy Officer.  Prior to joining CITGO, he spent seven years at the UNO-VEN Company before it became part of CITGO with the acquisition of the Lemont Refinery. Rick holds a master’s degree in business administration from Keller Graduate School of Management and a bachelor’s degree in business administration, marketing and management from the University of Wisconsin-Madison.

Art Klein
Vice President of Refining

Art Klein was named Vice President of Refining in July 2018. He has 37 years of refining industry experience. He joined CITGO in 1980 and has held various positions across CITGO refineries. Most recently, he served as Vice President and General Manager of the Corpus Christi Refinery and held the same role at the Lake Charles Refinery prior to that. Art has also worked as Manager of Capital Construction, Project Engineering Manager, and Asset Area Manager. He holds a bachelor’s degree in mechanical engineering from the University of Illinois.

Trina Martinez
Vice President and General Manager, Corpus Christi Refinery

Trina Martinez was named Vice President and General Manager of the Corpus Christi Refinery in July 2018. She has nearly 20 years industry experience. Trina joined CITGO in 1999 as an Automation Control Engineer at the Lake Charles Refinery; and prior to that worked for Petróleos de Venezuela, S.A. (PDVSA). At CITGO, Trina has served in numerous positions at both the Lake Charles and Corpus Christi Refineries, including General Manager of Technical & Administrative Services, Manager of Process Design & Strategic Planning, and Manager of Business Planning & Optimization. Trina received a bachelor’s degree in chemical engineering from Instituto Politecnico, Venezuela.

Jerry Dunn
Vice President and General Manager, Lake Charles Refinery

Jerry Dunn was been named Vice President and General Manager of the Lake Charles Manufacturing Complex in January 2018. Jerry has 29 years of industry related experience. He joined CITGO at the Lake Charles Refinery in 1989, where he has held many positions. Starting as a Project Engineer, Jerry also served as Fixed Equipment Engineer, Operations Engineer, Technical Services Supervisor, Capital Construction Manager, Manager of Projects, Manager Engineering Services, Operations Area Manager and General Manager of Technical Services. Jerry holds a bachelor’s degree in Civil Engineering from Louisiana State University.

Dennis Willig
Vice President and General Manager, Lemont Refinery

Dennis Willig was named Vice President and General Manager of the Lemont Refinery in July 2018. He has more than 20 years of refining industry experience. He joined CITGO in 1995 and most recently served as General Manager of Operations & Maintenance. Dennis has served in various roles at the Lemont Refinery including Manager of Economics & Logistics, Operations Manager, and Area Manager of Operations over various units, among others. Dennis holds a bachelor’s degree in chemical engineering from Purdue University.

Karl Schmidt
Vice President, Supply & Marketing

Karl Schmidt was named Vice President of Supply and Marketing in February 2019. He has more than 20 years’ experience in the petrochemical and refining industries, starting his career as a process engineer for Lyondell at its Houston refinery. Karl joined CITGO in 1995 and has held numerous roles in the corporate office and at the Lake Charles manufacturing site pertaining to process engineering, economic optimization, strategic planning, capital projects, operations management, terminals and pipelines and most recently as Assistant Vice President of Supply and Marketing.

Karl holds a Bachelor of Science degree in chemical engineering from the University of Texas and a master’s degree in business administration finance from the University of Houston’s Bauer School of Business.

Curtis Rowe
Vice President Finance & Chief Financial Officer

Curtis Rowe was named Vice President of Finance and Chief Financial Officer in February 2019. He has more than 27 years of service with CITGO, having held various positions in accounting, planning, and finance, including Director of Corporate Finance, Assistant Controller, Corporate Controller, Interim Treasurer, and Assistant Vice President Finance. Curtis holds a bachelor’s degree in business administration from the University of Oklahoma and a Master of Business Administration from the University of Tulsa.

Glenn Hilman
Vice President of Shared Services

Glenn Hilman was named Vice President of Shared Services in November 2017. Glenn joined CITGO in 1980 and has served in various roles, including Assistant Vice President Tax, Risk Management and Financial Planning, Interim General Manager Shared Services, General Manager Procurement, General Manager Terminal Facilities and Pipelines, Manager Budget and Performance Analysis, and Manager New Business Development. He is a Certified Public Accountant, holds a master’s degree in finance from the University of Houston and a bachelor’s degree in accounting from the University of Arizona. In addition he has attended Executive Management programs at Harvard University and Columbia University.

Judith Colbert
General Counsel & Assistant Secretary

Judith Colbert was named General Counsel & Assistant Secretary in November 2017. Judith has more than 25 years of experience in corporate governance, commercial, compliance and complex litigation, among other legal areas. She joined CITGO in 2008 and provided legal advice and support to numerous departments and committees as Senior Corporate Counsel, Senior Manager Corporate Counsel and most recently as Deputy General Counsel. She holds a Juris Doctor degree from Thurgood Marshall School of Law.

Gina Coon
Corporate Treasurer

Gina Coon was named Corporate Treasurer in July 2018.  She has 25 years of experience and service with CITGO; and most recently served as Assistant Treasurer. Prior to that, Gina was Manager of Cash Operations where she was responsible for cash management and banking operations. Gina’s background includes various levels of responsibility within IT applications support for Hydrocarbons Supply Chain, Risk Management and Marketing/Credit Card business units. She has served as chair of the SAP Global Industry Advisory Council and Downstream Supply Chain focus groups. She holds a master’s of business administration and a bachelor’s of science in management information systems from the University of Tulsa; and is a Certified Treasury Professional.

Barry Treas
Corporate Controller

Barry Treas was named Corporate Controller in February 2019. Barry has 37 years of oil industry related experience. He joined CITGO in 1995, and served most recently as the General Manager of Information Technology. Prior to that, Barry held positions as Manager of Mid-Office, Assistant Controller of Financial Reporting & General Accounting, Assistant Controller of Manufacturing and Operations, and Lake Charles Refinery Manager of Financial Services.  Barry’s prior experience includes wide exposure with positions in Finance, Accounting and Information Technology.  Barry holds a bachelor's degree in Accounting from Oklahoma State University.