Jeffrey Stroburg
Chairman and Chief Executive Officer
Over 25 years in petroleum and agricultural production industries including VP and COO of the Eastern Ag Region of Land O’ Lakes, President and CEO of Countrymark Cooperative (petroleum refiner and distributor), President and CEO of Hamilton Farm Bureau Cooperative. On Board of National Council of Farmer Cooperatives, Associated Benefits Corporation, Biosciences Alliance of Iowa, BIOWA Executive Committee, Cooperative Business International, Iowa State University’s Center for Crops Utilization Research Industry/Stakeholder Advisory Board and National Grain and Feed Association.

Daniel Oh
President and Chief Operating Officer
Over 20 years of experience in management and business. Prior to Renewable Energy Group, Inc., Mr. Oh was a Vice President and member of senior management at ABG, Inc., an agribusiness consulting firm responsible for management consulting and market research practice.

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.  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.

Nile Ramsbottom
Executive Vice President, Global Sales
Over 35 years in value added agriculture. EVP of West Central where he established West Central as a leader in the emerging biodiesel industry. EVP and Officer of Ralston Purina and Purina Mills. On Board of Directors of Simmons Foods, Simpson College and Western Iowa Energy.

Brad Albin
Vice President, Manufacturing
Over 22 years experience in executive operations positions in multi-feedstock BioDiesel, chemical, food and automotive supplier companies. Former committee member of NBAC and played significant role drafting BQ-9000 Standard. Managed engineering, operations, quality, R & D and ESH for last 15 years as VP or Director for companies such as Monsanto.

David Elsenbast
Vice President, Supply Chain Management
Over 20 years in agricultural business development, supply chain management, operations, and purchasing. VP of Business Development for Milk Specialties Company. Black Belt in Six Sigma.

Gary Haer
Vice President, Sales and Marketing
Over 13 years in the biodiesel industry. National Sales and Marketing Manager for West Central biodiesel efforts. On Governing Board for National Biodiesel Board. Vice-Chairman of Energy Committee for National Council of Farm Cooperatives.

Sara Taylor
Executive Director, Corporate Affairs
Taylor brings a wealth of experience in coordinating REG's public policy and public affairs strategies. She is a former top political strategist for President Bush and brings 10 years of experience in message development and issue advocacy to REG.

Keith Olson

Executive Director, Corporate Finance & Investment Banking

Mr. Olson leads REG’s Corporate Finance and Investment Banking activities with responsibility for financings, strategy, and mergers and acquisitions.  Additionally, he assists in the evaluation of business development opportunities and strategic investments, and coordinates internal financial analysis on behalf of other REG business units.

James Barclay
Director, Human Resources
Mr. Barclay has over 25 years of human resources and personnel development experience and leadership including over 20 years in U.S. Air Force as a Man Power and Personnel Officer.

Patrick Hammen
Chief Information Officer
Mr. Hammen has experience in evaluating, choosing, implementing and upgrading systems and information technology solutions.  As CIO, Hammen incorporates new technology services, software and programs for Renewable Energy Group’s nationwide network of biodiesel production facilities and growing headquarters.

Natalie Lischer

Treasurer                          

Ms. Lischer oversees credit, invoicing, cash management, tax and inventory, accounts payable and debt banking relationships for the REG network nationwide.

Glen Meier

Director, Technology & Feedstock Development                            

Mr. Meier investigates new technologies that are complementary to REG’s business and assigns priorities, staff and resources to multiple projects. The Technology & Feedstock Development department is a core strength of REG and the department supports many other functions of the business including Quality, Production, Procurement and Construction.. 

Don Nelson

Director, National Sales                             

Mr. Nelson works with private and public fleets and the petroleum industry to introduce biodiesel into new markets, grow Renewable Energy Group’s current market share and develop national strategies for biodiesel consumption. 

Jon Scharingson

Director, Sales                           

More than 20 years of experience working in marketing and biotechnology. Mr. Scharingson oversees national market development strategies for Renewable Energy Group, Inc. and the commercial-scale biodiesel production facilities in the REG network nationwide. 

Dave Slade, Ph.D.

Director, Technical Services                         

More than 12 years experience in process development, technology transfer and laboratory quality control testing. Mr. Slade has experience in pharmaceutical formulations development and catalytic reaction engineering.