Dr. Barber has served as a Director of the company since 2025. Dr. Barber currently serves on the board of directors of Graham Corporation (NYSE: GHM), where he chairs the Compensation Committee and is a member of the Audit and Nomination and Governance Committees. Dr. Barber holds a Ph.D. in Organic Chemistry from the Massachusetts Institute of Technology (MIT) and a B.S. in Chemistry from Rensselaer Polytechnic Institute. He is also a recipient of the American Chemical Society's Henry F. Whalen, Jr. Award for Business Development and holds a Directorship Certification from the National Association of Corporate Directors.
William H. Baum has served as a director of the Company since January 2016 and serves on our Nominating and Corporate Governance Committee. Since January 2015, Mr. Baum has operated a consulting business advising small biofuel and renewable chemical companies on a variety of commercial matters. Mr. Baum served as Chief Business Development Officer of Genomatica, Inc. from September 2010 until April 2014. From August 1997 to September 2010, Mr. Baum served in various roles at Diversa Corporation (now known as Verenium Corporation), a biotechnology company focused on the development of biofuels, including Vice President Sales and Marketing from August 1997 to November 1999, Senior Vice President, Business Development from November 1999 to July 2002 and Executive Vice President, Business Development from July 2002 to August 2010. Prior to joining Diversa, Mr. Baum served as the Vice President of Global Sales and Marketing at International Specialty Products, Inc., a specialty chemicals company, and held a variety of executive positions, both in the United States and internationally, at Betz Laboratories, Inc., a specialty chemicals company. Mr. Baum currently serves as a director on the board of directors for Watt Companies, Inc., Leaf Resources Limited and Arzeda Corporation.
Paul D. Bloom has served as Chief Executive Officer since April 2026, and as President and director of the Company since December 2025. He previously served as Chief Carbon Officer and Chief Innovation Officer beginning in March 2021. Prior to joining the Company, Dr. Bloom served as Vice President, Sustainable Materials for Archer-Daniels-Midland Company (“ADM”), a leading, publicly traded food processing and commodities trading company, from March 2020 to March 2021. From November 2013 through March 2020, Dr. Bloom served as Vice President, Process and Chemical Research at ADM, and prior to that held a series of commercial and technical roles of increasing responsibility at ADM between 2001 and 2013. Dr. Bloom holds a PhD in Chemistry.
Katie Ellet, appointed as a Director of the Company in January 2024, currently holds the position of Chief Executive Officer of ETCH, Inc. With an extensive career spanning from the mid-1990s, she has demonstrated leadership in diverse roles, including lab supervision, chemicals research & development, production management, and oversight of environment, health, safety, and quality. Ms. Ellet has successfully managed P&L responsibilities in various capacities and played key roles in leadership, brand strategy, and marketing within the chemicals, fuels, oilfield management, and investment sectors. Her achievements include spearheading a trans-national mobility strategy and overseeing operations, marketing, investment, and risk management for North America as part of her role with the global clean hydrogen producer. A graduate of Michigan Technological University with a Bachelor of Science in Chemical Engineering, Ms. Ellet further earned a Master of Chemical Engineering from the University of Houston.
Patrick R. Gruber has served as Chief Executive Officer and a director of the Company since 2007, and retired from his role as Chief Executive Officer in 2026. Prior to joining the Company, from 2005 to 2007, Dr. Gruber was President and Chief Executive Officer of Outlast Technologies, Inc. (“Outlast Technologies”), a technology and marketing company primarily serving the textile industry, where he was responsible for all aspects of Outlast Technologies’ business. Previously, Dr. Gruber co-founded NatureWorks LLC (formerly Cargill Dow, LLC) (“NatureWorks”) and served as Vice President, Technology and Operations, and Chief Technology Officer from 1997 to 2005, where he was responsible for all aspects of the business, including project, application and process technology development. From 2007 to May 2012, Dr. Gruber served on the board of directors of Segetis, Inc. From 2007 to January 2012, Dr. Gruber served on the board of directors of Green Harvest Technologies, LLC and from 2007 to 2008, he served on the board of directors of Outlast Technologies. In 2011, Dr. Gruber was awarded the University of Minnesota Outstanding Achievement Award. In 2008, Dr. Gruber was awarded the first ever George Washington Carver Award, recognizing significant contributions by individuals in the field of industrial biotechnology and its application in biological engineering, environmental science, biorefining and bio based products.
Jaime Guillen has served as a director of the Company since August 2021 and serves on the Audit Committee (Chair). Since 2014, Mr. Guillen has served as a Managing Partner at Faros Infrastructure Partners LLC, an investment firm with offices in United Kingdom, United States and Mexico. Mr. Guillen is also the Head of Asset Management for Mexico Infrastructure Partners and has approximately 30 years of experience in equity investments, project finance, project development, commercial contract negotiations, and company operations in a variety of sectors including energy, transport, natural resources, private equity and fund management. Earlier in his career, Mr. Guillen worked for major international firms including as Chief Executive Officer of Alterra Partners, Managing Director for Bechtel Enterprises and as a Vice President of Bechtel Financing Services. Mr. Guillen currently serves as the Chairman of the Board of Directors of Polaris Infrastructure Inc. (TSX: PIF), a Toronto-based publicly listed company engaged in the operation, acquisition and development of renewable energy projects in Latin America.
Andrew J. Marsh has served as a director since February 2015 and serves on our Compensation Committee (Chair). Previously, Mr. Marsh served as President and Chief Executive Officer of Plug Power Inc., an alternative energy technology provider engaged in the design, development, manufacture, and commercialization of fuel cell systems for the industrial off-road markets worldwide, since 2008. In addition, Mr. Marsh was a co-founder of Valere Power (“Valere”), where he served as Chief Executive Officer and a board member from Valere’s inception in 2001 through its sale to Eltek ASA in 2007. Prior to founding Valere, Mr. Marsh spent almost 18 years with Lucent Bell Laboratories in a variety of sales and technical management positions. Mr. Marsh is a prominent voice leading the hydrogen and fuel cell industry. Nationally, Mr. Marsh is the Chairman of the Fuel Cell and Hydrogen Energy Association and sits as a member of the Hydrogen and Fuel Cell Tactical Committee.
Gary W. Mize, has served as a director of the Company since September 2011 and serves on the Audit Committee and Compensation Committee. Since October 2009, Mr. Mize has held the position of partner and owner at MR & Associates. Since March 2021, Mr. Mize has served as the Lead Director of Darling Ingredients, Inc. ("Darling") and is Chair of its nominating and corporate governance committee. Mr. Mize has served as a director of Darling since May 2016 and previously served as a member of its audit committee, compensation committee and environmental, social and governance committee. Since October 2020, Mr. Mize has served as a director of United Malt Group Limited and serves as a member of its environment, health and safety committee and its nominations and remuneration committee. Mr. Mize also served as non-executive Chairman at Ceres Global AG from December 2007 to April 2010 and has served as an independent director of Ceres Global AG and a member of its audit committee (Chair) from October 2013 to December 2021. In addition, Mr. Mize served Noble Group, Hong Kong, as Global Chief Operating Officer and Executive Director from July 2003 to December 2005 and Non-Executive Director from December 2005 to December 2006. Previously, he was President of the Grain Processing Group at ConAgra Foods, Inc., President and Chief Executive Officer of ConAgra Malt and held various positions at Cargill, Inc. Mr. Mize brings international business experience to the Board having previously held expatriate positions in Switzerland, Brazil and Hong Kong. We believe Mr. Mize’s qualifications to sit on our Board include his international experience, coupled with his decades of experience in agribusiness.
Todd Werpy has served as a Director of the Company since August 2026. A recognized scientist, innovator and business leader, Werpy most recently served as Chief Science Officer and a member of the Executive Committee at Archer-Daniels-Midland Company (ADM) where he helped build a strong technology pipeline that generated significant enterprise value through innovation, commercialization and strategic partnerships. His expertise spans biotechnology, catalysis, process engineering and commercialization of bio-based technologies.
Werpy holds a Ph.D. in Inorganic Chemistry from Michigan State University and is a graduate of the Harvard Business School Executive Leadership Program. He holds 36 U.S. patents and more than 100 patents globally and is the recipient of the American Chemical Society’s Green Chemistry Award. He is also widely recognized as a co-author of the U.S. Department of Energy report, Top 12 Value-Added Chemicals from Biomass.