Chad Stone
Chief Financial Officer

Mr. Stone has served as Renewable Energy Group’s Chief Financial Officer since August of 2009. Prior to joining Renewable Energy Group, Inc., Mr. Stone served over 17 years in public accounting and consulting in various roles, including as a Director at PricewaterhouseCoopers in Chicago and Cincinnati and as a Manager at Arthur Andersen in Chicago. He holds an M.B.A. in Finance from the University of Chicago, Graduate School of Business and a B.B.A. in Accounting from the University of Iowa. He is also a Certified Public Accountant.

Mr. Stone has served on Executive Board of the Iowa Biodiesel Board since 2010 and is the current chair, on the Governing Board of the National Biodiesel Board and on the School of Management Advisory Committee for the University Of Iowa Tippie School Of Business.

Brad Albin
Vice President, Manufacturing
With more than 25 years, Brad Albin has lead all aspects of manufacturing operations at state-of-the-art, commercial manufacturing facilities; including experience in executive operations positions in multi-feedstock biodiesel, chemical, food and automotive supplier companies. Mr. Albin held a charter member position within the National Biodiesel Accreditation Committee (NBAC) and played significant role drafting the BQ-9000 Standard and various aspects of the ASTM D6751 specifications on the ASTM D2 committee. Prior to joining REG, Mr. Albin managed the engineering, operations, quality, R & D and ESH as well as Vice President or Director for companies such as Monsanto.
David Elsenbast
Vice President, Supply Chain Management
For more than 25 years, Dave Elsenbast has been a leader in agricultural business development, supply chain management, operations, and purchasing. Prior to joining REG, Mr. Elsenbast served as the Vice President of Business Development for Milk Specialties Company. He has also earned a Black Belt in Six Sigma accreditation. Mr. Elsenbast currently serves on the board for the American Fats and Oils Association.
Gary Haer
Vice President, Sales and Marketing
For more than 15 years, Gary Haer has been at the forefront of the biodiesel industry. As the biodiesel industry began to take shape in early 2000, Mr. Haer served as the National Sales and Marketing Manager for biodiesel for West Central. As REG emerged from West Central, he took the help coordinating the Sales and Marketing department including national and international biodiesel sales. In 2010, Mr. Haer's sales team was responsible for approximately 25 percent of all biodiesel sold in the United States. Currently, Mr. Haer serves as the Chairman of the National Biodiesel Board and a member of the Political Action Committee.
Natalie Merrill
Chief of Staff & Vice President and Corporate Secretary

For more than 15 years, Natalie Merrill has worked within the finance and accounting sectors. Ms. Merrill leads REG's Corporate Finance and Investment Banking activities with responsibility for financing strategy and mergers and acquisitions. Additionally, she oversees the company's operations control team and operations center. Ms. Merrill assists in the evaluation of business development opportunities and strategic investments and coordinates internal financial analysis on behalf of other REG business units.