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Dennis Willig portrait

Dennis Willig

Vice President & General Manager, Lemont Refinery

Dennis Willig was named Vice President & General Manager of the Lemont Refinery in July 2018. He has more than 27 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.

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