Ruth Dreessen – Chairperson

Ms. Ruth Dreessen, Chairperson, a director of Gevo since March 2012, is also a member of the Company’s Audit Committee. Ms. Dreessen is Managing Director of Lion Chemical Capital, LLC, a private equity firm focused on the chemical and related industries. She has a successful track record in investment banking with a focus in the chemical industry and a strong core understanding of the chemical market.

Prior to joining Lion Chemical Capital, Ms. Dreessen served as the Executive Vice President and Chief Financial Officer of TPC Group Inc. from 2005 to 2010. During this time, she executed the acquisition and financing of Huntsman’s C4 processing business and led the finance, accounting and treasury functions as well as strategic planning and corporate development initiatives. Before joining TPC Group, Ms. Dreessen served as Senior Vice President, Chief Financial Officer and Director of Westlake Chemical Corporation. She spent 21 years at JP Morgan Securities and predecessor companies, ultimately as a Managing Director of chemicals investment banking, focused on leveraged and private equity transactions in chemicals and related industries.

Ms. Dreessen currently serves on the board of Versar, Inc. (VSR), and has previously served on the boards of the Georgia Gulf Corporation, Westlake Chemical Corporation and the Better Minerals & Aggregates Corporation. She holds a Master of International Affairs (MIA) degree from Columbia University and a bachelor’s degree in European history from New College of Florida.