Board Committees

Gilbert E. Nathan has served as a director since November 2019 and, prior to formally joining our Board as a director, served as an advisor to our Board since November 2015. Mr. Nathan is the Managing Member of Jackson Square Advisors LLC, which he founded in 2015. He serves on the Board of Directors of Ready Capital Corporation, a public company, and also serves as the Chief Executive Officer of Keycon Power Holdings LLC, a position he has held since November 2018, and as a liquidating trust board member of Hercules Offshore Liquidating Trust. He previously served on the boards of directors of Owens Realty Mortgage, Inc. and Emergent Capital, Inc. From 2013 to 2015, Mr. Nathan was a Senior Analyst with Candlewood Investment Group, an investment firm with significant debt and equity investments in the ethanol industry. From 2002 to 2012, Mr. Nathan was a Principal at Restoration Capital Management, an investment firm focused on distressed investments, event driven situations, and high-yield debt. Mr. Nathan has a B.S. degree in Management, Major in Finance from the A. B. Freeman School of Business at Tulane University.

Douglas L. Kieta has served as a director since April 2006. Mr. Kieta works as a consultant through Century West Projects, Inc., of which he is the President and an owner, providing project and construction management services. Prior to 2009, Mr. Kieta was employed by BE&K, Inc., a large engineering and construction company headquartered in Birmingham, Alabama, where he served as the Vice President of Power from May 2006 to January 2009. From April 1999 to April 2006, Mr. Kieta was employed at Calpine Corporation where he was the Senior Vice President of Construction and Engineering. Calpine Corporation is a major North American power company which leases and operates integrated systems of fuel-efficient natural gas-fired and renewable geothermal power plants and delivers clean, reliable and fuel-efficient electricity to customers and communities in 21 states and three Canadian provinces. Mr. Kieta has a B.S. degree in Civil Engineering from Clarkson University and a Master’s degree in Civil Engineering from Cornell University.

Dianne S. Nury has served as a director since November 2019 and, prior to formally joining our Board as a director, served as an advisor to our Board since August 2018. Ms. Nury has served since 1990 as President and Chief Executive Officer of Vie-Del Company, a family-owned winery, distillery and fruit juice processor manufacturing liquid ingredients for spirits, wine, food and beverage companies. Ms. Nury serves on the Board of Directors and is a former Chairman of the Board of the Wine Institute, the largest advocacy and public policy association for California wine. Ms. Nury is a member of the Juice Products Association, the national trade association representing the fruit and juice products industry, and formerly served as Chairman of its Board of Directors. She is a member of the Board of Directors of the Agricultural Foundation for California State University at Fresno, where she serves as the Vice Chairman of the Viticulture and Enology Industry Advisory Board. Ms. Nury previously served on the USDA Fruit and Vegetable Industry Advisory Committee. Ms. Nury is a Board Member of the Foundation for Clovis Schools, Clovis, California, and previously served on the Board of Trustees of the Saint Agnes Medical Center, Fresno, California. Ms. Nury has a B.S. degree in Business from California State University at Fresno.

Maria G. Gray has served as an advisor to our Board since 2021. Ms. Gray served as a Senior Refining Engineer at Marathon Petroleum Company, an American petroleum refining, marketing, and transportation company headquartered in Findlay, Ohio. From 2012 to 2021, Ms. Gray served in several capacities including as a Senior Health, Safety, and Environmental Professional and as a Project Process Engineering Lead, at Marathon Petroleum Company. Ms. Gray also served in various engineering and supervisory capacities from 2001 to 2012 for Motiva Enterprises LLC, then a joint venture between Shell Oil Company and Saudi Refining Inc, a subsidiary of Saudi Aramco, that operates North America’s largest refinery in Port Arthur, Texas, producing and distributing fuels and specialty chemicals. Ms. Gray also served as a Process Engineer for Union Carbide Corporation, a wholly-owned subsidiary of Dow Chemical Company, that produces specialty chemicals and polymers. Ms. Gray has a B.S. degree in Chemical Engineering, Minor in Business and Minor in Architecture from Tulane University.

Dianne S. Nury has served as a director since November 2019 and, prior to formally joining our Board as a director, served as an advisor to our Board since August 2018. Ms. Nury has served since 1990 as President and Chief Executive Officer of Vie-Del Company, a family-owned winery, distillery and fruit juice processor manufacturing liquid ingredients for spirits, wine, food and beverage companies. Ms. Nury serves on the Board of Directors and is a former Chairman of the Board of the Wine Institute, the largest advocacy and public policy association for California wine. Ms. Nury is a member of the Juice Products Association, the national trade association representing the fruit and juice products industry, and formerly served as Chairman of its Board of Directors. She is a member of the Board of Directors of the Agricultural Foundation for California State University at Fresno, where she serves as the Vice Chairman of the Viticulture and Enology Industry Advisory Board. Ms. Nury previously served on the USDA Fruit and Vegetable Industry Advisory Committee. Ms. Nury is a Board Member of the Foundation for Clovis Schools, Clovis, California, and previously served on the Board of Trustees of the Saint Agnes Medical Center, Fresno, California. Ms. Nury has a B.S. degree in Business from California State University at Fresno.

Gilbert E. Nathan has served as a director since November 2019 and, prior to formally joining our Board as a director, served as an advisor to our Board since November 2015. Mr. Nathan is the Managing Member of Jackson Square Advisors LLC, which he founded in 2015. He serves on the Board of Directors of Ready Capital Corporation, a public company, and also serves as the Chief Executive Officer of Keycon Power Holdings LLC, a position he has held since November 2018, and as a liquidating trust board member of Hercules Offshore Liquidating Trust. He previously served on the boards of directors of Owens Realty Mortgage, Inc. and Emergent Capital, Inc. From 2013 to 2015, Mr. Nathan was a Senior Analyst with Candlewood Investment Group, an investment firm with significant debt and equity investments in the ethanol industry. From 2002 to 2012, Mr. Nathan was a Principal at Restoration Capital Management, an investment firm focused on distressed investments, event driven situations, and high-yield debt. Mr. Nathan has a B.S. degree in Management, Major in Finance from the A. B. Freeman School of Business at Tulane University.

Dianne S. Nury has served as a director since November 2019 and, prior to formally joining our Board as a director, served as an advisor to our Board since August 2018. Ms. Nury has served since 1990 as President and Chief Executive Officer of Vie-Del Company, a family-owned winery, distillery and fruit juice processor manufacturing liquid ingredients for spirits, wine, food and beverage companies. Ms. Nury serves on the Board of Directors and is a former Chairman of the Board of the Wine Institute, the largest advocacy and public policy association for California wine. Ms. Nury is a member of the Juice Products Association, the national trade association representing the fruit and juice products industry, and formerly served as Chairman of its Board of Directors. She is a member of the Board of Directors of the Agricultural Foundation for California State University at Fresno, where she serves as the Vice Chairman of the Viticulture and Enology Industry Advisory Board. Ms. Nury previously served on the USDA Fruit and Vegetable Industry Advisory Committee. Ms. Nury is a Board Member of the Foundation for Clovis Schools, Clovis, California, and previously served on the Board of Trustees of the Saint Agnes Medical Center, Fresno, California. Ms. Nury has a B.S. degree in Business from California State University at Fresno.

Douglas L. Kieta has served as a director since April 2006. Mr. Kieta works as a consultant through Century West Projects, Inc., of which he is the President and an owner, providing project and construction management services. Prior to 2009, Mr. Kieta was employed by BE&K, Inc., a large engineering and construction company headquartered in Birmingham, Alabama, where he served as the Vice President of Power from May 2006 to January 2009. From April 1999 to April 2006, Mr. Kieta was employed at Calpine Corporation where he was the Senior Vice President of Construction and Engineering. Calpine Corporation is a major North American power company which leases and operates integrated systems of fuel-efficient natural gas-fired and renewable geothermal power plants and delivers clean, reliable and fuel-efficient electricity to customers and communities in 21 states and three Canadian provinces. Mr. Kieta has a B.S. degree in Civil Engineering from Clarkson University and a Master’s degree in Civil Engineering from Cornell University.

Maria G. Gray has served as an advisor to our Board since 2021. Ms. Gray served as a Senior Refining Engineer at Marathon Petroleum Company, an American petroleum refining, marketing, and transportation company headquartered in Findlay, Ohio. From 2012 to 2021, Ms. Gray served in several capacities including as a Senior Health, Safety, and Environmental Professional and as a Project Process Engineering Lead, at Marathon Petroleum Company. Ms. Gray also served in various engineering and supervisory capacities from 2001 to 2012 for Motiva Enterprises LLC, then a joint venture between Shell Oil Company and Saudi Refining Inc, a subsidiary of Saudi Aramco, that operates North America’s largest refinery in Port Arthur, Texas, producing and distributing fuels and specialty chemicals. Ms. Gray also served as a Process Engineer for Union Carbide Corporation, a wholly-owned subsidiary of Dow Chemical Company, that produces specialty chemicals and polymers. Ms. Gray has a B.S. degree in Chemical Engineering, Minor in Business and Minor in Architecture from Tulane University.

Mike Kandris, named Interim Chief Operating Officer, has served the company for over 17 years. Originally an independent contractor with a focus on plant operations, Mr. Kandris became a member of the company’s board of directors in 2008, began serving as Chief Operating Officer in 2013, and served as President and Chief Executive Officer from 2020 until retiring from those roles in 2023. He has over 40 years of general management experience in the transportation and logistics industry in executive management at Ruan Transportation Management Systems (RTMS). Additionally, Mr. Kandris served on the Executive Committee of the American Trucking Association and as a board member for the National Tank Truck Organization. Mr. Kandris has a B.S. degree in Business from California State University, Hayward.

Dianne S. Nury has served as a director since November 2019 and, prior to formally joining our Board as a director, served as an advisor to our Board since August 2018. Ms. Nury has served since 1990 as President and Chief Executive Officer of Vie-Del Company, a family-owned winery, distillery and fruit juice processor manufacturing liquid ingredients for spirits, wine, food and beverage companies. Ms. Nury serves on the Board of Directors and is a former Chairman of the Board of the Wine Institute, the largest advocacy and public policy association for California wine. Ms. Nury is a member of the Juice Products Association, the national trade association representing the fruit and juice products industry, and formerly served as Chairman of its Board of Directors. She is a member of the Board of Directors of the Agricultural Foundation for California State University at Fresno, where she serves as the Vice Chairman of the Viticulture and Enology Industry Advisory Board. Ms. Nury previously served on the USDA Fruit and Vegetable Industry Advisory Committee. Ms. Nury is a Board Member of the Foundation for Clovis Schools, Clovis, California, and previously served on the Board of Trustees of the Saint Agnes Medical Center, Fresno, California. Ms. Nury has a B.S. degree in Business from California State University at Fresno.

Bryon McGregor has served the company for over 17 years. Named CEO in 2023 and elected to the Board of Directors in 2024, Mr. McGregor joined Alto Ingredients in 2008 as Vice President Finance/Treasurer and later appointed Chief Financial Officer in 2009. During his tenure as CFO, McGregor has led multiple financings, integrated acquisitions, strengthened the company’s balance sheet and implemented cost reduction programs. He served as Brokerage Treasurer for E*TRADE Financial, overseeing Europe and Asian treasury operations, where his responsibilities included international and U.S. brokerage treasury operations, corporate finance, and investor relations. Prior to that, as Manager, Global Head of Project Finance at BP (formerly ARCO, one of the top 10 fully integrated multi-national oil and gas companies in the world at that time), Mr. McGregor was responsible for the development of and managing investments in global industrial and infrastructure projects, including a multi-billion dollar LNG project in Indonesia, a $3 billion heavy-oil project in Venezuela, over $1 billion in regasification and natural gas pipeline projects, and over a $1 billion in various other energy and chemical investments located both domestically and internationally. When at Credit Suisse, he developed limited-recourse financing opportunities globally in excess of $8 billion in energy, petrochemical, mining, infrastructure, telecommunications, as well as facilitated M&A for clients. Mr. McGregor has a B.S. degree in Business Management from Brigham Young University.

Auste Graham has over 15 years of legal experience working across multiple industries, including chemicals, packaging, and corporate securities. Prior to joining Alto in 2022, she served as Vice President, Legal, for Essentra plc, where she was responsible for all legal and compliance affairs in the Americas.

Prior to Essentra, Ms. Graham served as Senior Legal Counsel for AkzoNobel. She began her career at Schiff Hardin LLP, where she provided general corporate representation to public and private companies, managing mergers and acquisitions, governance and compliance matters, and corporate and securities transactions, including corporate debt and equity offerings and private equity investments.

Ms. Graham earned her J.D from Vanderbilt University Law School and a B.A. from Vassar College.

Dianne S. Nury has served as a director since November 2019 and, prior to formally joining our Board as a director, served as an advisor to our Board since August 2018. Ms. Nury has served since 1990 as President and Chief Executive Officer of Vie-Del Company, a family-owned winery, distillery and fruit juice processor manufacturing liquid ingredients for spirits, wine, food and beverage companies. Ms. Nury serves on the Board of Directors and is a former Chairman of the Board of the Wine Institute, the largest advocacy and public policy association for California wine. Ms. Nury is a member of the Juice Products Association, the national trade association representing the fruit and juice products industry, and formerly served as Chairman of its Board of Directors. She is a member of the Board of Directors of the Agricultural Foundation for California State University at Fresno, where she serves as the Vice Chairman of the Viticulture and Enology Industry Advisory Board. Ms. Nury previously served on the USDA Fruit and Vegetable Industry Advisory Committee. Ms. Nury is a Board Member of the Foundation for Clovis Schools, Clovis, California, and previously served on the Board of Trustees of the Saint Agnes Medical Center, Fresno, California. Ms. Nury has a B.S. degree in Business from California State University at Fresno.

Mike Kandris, named Interim Chief Operating Officer, has served the company for over 17 years. Originally an independent contractor with a focus on plant operations, Mr. Kandris became a member of the company’s board of directors in 2008, began serving as Chief Operating Officer in 2013, and served as President and Chief Executive Officer from 2020 until retiring from those roles in 2023. He has over 40 years of general management experience in the transportation and logistics industry in executive management at Ruan Transportation Management Systems (RTMS). Additionally, Mr. Kandris served on the Executive Committee of the American Trucking Association and as a board member for the National Tank Truck Organization. Mr. Kandris has a B.S. degree in Business from California State University, Hayward.

Bryon McGregor has served the company for over 17 years. Named CEO in 2023 and elected to the Board of Directors in 2024, Mr. McGregor joined Alto Ingredients in 2008 as Vice President Finance/Treasurer and later appointed Chief Financial Officer in 2009. During his tenure as CFO, McGregor has led multiple financings, integrated acquisitions, strengthened the company’s balance sheet and implemented cost reduction programs. He served as Brokerage Treasurer for E*TRADE Financial, overseeing Europe and Asian treasury operations, where his responsibilities included international and U.S. brokerage treasury operations, corporate finance, and investor relations. Prior to that, as Manager, Global Head of Project Finance at BP (formerly ARCO, one of the top 10 fully integrated multi-national oil and gas companies in the world at that time), Mr. McGregor was responsible for the development of and managing investments in global industrial and infrastructure projects, including a multi-billion dollar LNG project in Indonesia, a $3 billion heavy-oil project in Venezuela, over $1 billion in regasification and natural gas pipeline projects, and over a $1 billion in various other energy and chemical investments located both domestically and internationally. When at Credit Suisse, he developed limited-recourse financing opportunities globally in excess of $8 billion in energy, petrochemical, mining, infrastructure, telecommunications, as well as facilitated M&A for clients. Mr. McGregor has a B.S. degree in Business Management from Brigham Young University.

Douglas L. Kieta has served as a director since April 2006. Mr. Kieta works as a consultant through Century West Projects, Inc., of which he is the President and an owner, providing project and construction management services. Prior to 2009, Mr. Kieta was employed by BE&K, Inc., a large engineering and construction company headquartered in Birmingham, Alabama, where he served as the Vice President of Power from May 2006 to January 2009. From April 1999 to April 2006, Mr. Kieta was employed at Calpine Corporation where he was the Senior Vice President of Construction and Engineering. Calpine Corporation is a major North American power company which leases and operates integrated systems of fuel-efficient natural gas-fired and renewable geothermal power plants and delivers clean, reliable and fuel-efficient electricity to customers and communities in 21 states and three Canadian provinces. Mr. Kieta has a B.S. degree in Civil Engineering from Clarkson University and a Master’s degree in Civil Engineering from Cornell University.

Maria G. Gray has served as an advisor to our Board since 2021. Ms. Gray served as a Senior Refining Engineer at Marathon Petroleum Company, an American petroleum refining, marketing, and transportation company headquartered in Findlay, Ohio. From 2012 to 2021, Ms. Gray served in several capacities including as a Senior Health, Safety, and Environmental Professional and as a Project Process Engineering Lead, at Marathon Petroleum Company. Ms. Gray also served in various engineering and supervisory capacities from 2001 to 2012 for Motiva Enterprises LLC, then a joint venture between Shell Oil Company and Saudi Refining Inc, a subsidiary of Saudi Aramco, that operates North America’s largest refinery in Port Arthur, Texas, producing and distributing fuels and specialty chemicals. Ms. Gray also served as a Process Engineer for Union Carbide Corporation, a wholly-owned subsidiary of Dow Chemical Company, that produces specialty chemicals and polymers. Ms. Gray has a B.S. degree in Chemical Engineering, Minor in Business and Minor in Architecture from Tulane University.

Mike Kandris, named Interim Chief Operating Officer, has served the company for over 17 years. Originally an independent contractor with a focus on plant operations, Mr. Kandris became a member of the company’s board of directors in 2008, began serving as Chief Operating Officer in 2013, and served as President and Chief Executive Officer from 2020 until retiring from those roles in 2023. He has over 40 years of general management experience in the transportation and logistics industry in executive management at Ruan Transportation Management Systems (RTMS). Additionally, Mr. Kandris served on the Executive Committee of the American Trucking Association and as a board member for the National Tank Truck Organization. Mr. Kandris has a B.S. degree in Business from California State University, Hayward.

Bryon McGregor has served the company for over 17 years. Named CEO in 2023 and elected to the Board of Directors in 2024, Mr. McGregor joined Alto Ingredients in 2008 as Vice President Finance/Treasurer and later appointed Chief Financial Officer in 2009. During his tenure as CFO, McGregor has led multiple financings, integrated acquisitions, strengthened the company’s balance sheet and implemented cost reduction programs. He served as Brokerage Treasurer for E*TRADE Financial, overseeing Europe and Asian treasury operations, where his responsibilities included international and U.S. brokerage treasury operations, corporate finance, and investor relations. Prior to that, as Manager, Global Head of Project Finance at BP (formerly ARCO, one of the top 10 fully integrated multi-national oil and gas companies in the world at that time), Mr. McGregor was responsible for the development of and managing investments in global industrial and infrastructure projects, including a multi-billion dollar LNG project in Indonesia, a $3 billion heavy-oil project in Venezuela, over $1 billion in regasification and natural gas pipeline projects, and over a $1 billion in various other energy and chemical investments located both domestically and internationally. When at Credit Suisse, he developed limited-recourse financing opportunities globally in excess of $8 billion in energy, petrochemical, mining, infrastructure, telecommunications, as well as facilitated M&A for clients. Mr. McGregor has a B.S. degree in Business Management from Brigham Young University.