Iowa Biodiesel Board
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Board of Directors

Nathan Nolte


Nathan Nolte of AGP serves as Chair of the Iowa Biodiesel Board. At AGP, he serves as Sales Manager of Renewable Fuels. He has worked with AGP since 2010 in various roles involving accounting and marketing. Prior to AGP, Nathan attended the University of Nebraska-Lincoln and grew up on a...

Derek Winkel

Vice Chair

Derek Winkel represents Chevron REG on the IBB Board of Directors. Currently he serves as Vice President, Manufacturing Operations of Chevron Renewable Energy Group. In that role, Winkel coordinates the efficient operation of the company’s 12 operating plants by leading a team that monitors plant performance, analyzes data and drives...

Thomas Brooks


Tom Brooks is general manager of Western Dubuque Biodiesel, a 30 Million gallon production facility located in Farley, Iowa. He is a past chair of the Iowa Biodiesel Board. Brooks was hired by Griffin Industries in 1993 and served as a general manager for several locations within Florida before accepting...

Pat Woerner

IBB Secretary

Pat Woerner of Cargill serves as secretary of the Iowa Biodiesel Board.

Dave Walton

Iowa Soybean Association

Dave Walton is a farmer from Wilton, Iowa. He grows soybeans, corn, alfalfa, grass hay, and raises beef cattle, and sheep. Dave took over the farm from his father, and his oldest son is now joining the operation. His wife Paula, and youngest son Alex have also been an integral...

Brad Wilson

Brad Wilson is President and General Manager of Western Iowa Energy, LLC, a biodiesel producer based in Wall Lake, Iowa. An accountant by trade, Wilson spent several years as a financial auditor. He became president and general manager of WIE in 2016. The multi-feedstock plant recently grew from 30 to...

Reo Menning


Reo Menning serves as President & CEO of RINAlliance in Urbandale, Iowa. RINAlliance provides a software platform and expertise to help companies comply with the U.S. Renewable Fuel Standard.

Mark Cobb

Iowa Renewable Energy, LLC

Mark Allan Cobb holds the position of President at Cobb Oil Co., Inc. in Washington, Iowa. He also sits on the board of Iowa Renewable Energy LLC and Petroleum Marketers, Inc. He is past Chair for the Iowa Biodiesel Board.

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