Alliance Leadership Bios

To learn more about the executive team who leads the Alliance for Sustainable Energy, LLC, read their biographies.

Dr. Martin Keller — President and Laboratory Director

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Martin Keller became the National Renewable Energy Laboratory's (NREL) 9th director on November 30, 2015. He also serves as the President of Alliance for Sustainable Energy, LLC.

Keller has joined NREL from Oak Ridge National Laboratory (ORNL) where he served as the Associate Laboratory Director for Energy and Environmental Sciences, which includes ORNL's programs in biosciences, environmental sciences, buildings technologies, transportation, climate change, manufacturing, and electrical and electronics systems. In 2006, Keller was recruited to ORNL from an industrial enzyme discovery and development company to lead the Office of Science-supported BioEnergy Science Center, in which NREL is a partner.

Keller earned his doctorate in Microbiology (Summa Cum Laude) from the University of Regensburg in Germany. He was appointed a fellow of the American Association for the Advancement of Science in 2013. He serves on multiple boards and advisory panels, including the Science Advisory Board for the Council on Competitiveness.

Peter F. Green — Senior Vice President and Deputy Laboratory Director

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As deputy laboratory director, Peter Green is responsible for NREL's science and research goals, strengthening the laboratory's core capabilities, and enhancing NREL's research portfolio.

Green came to NREL in August 2016 from the University of Michigan College of Engineering, where he was the Vincent T. and Gloria M. Gorguze Professor of Engineering, and also professor of materials science and engineering, chemical engineering, macromolecular science and engineering, and applied physics. He also recently served as director for DOE's Energy Frontiers Research Center (EFRC) for solar and thermal energy conversion. During that time, the EFRC made significant new advances in science and engineering, which were documented in more than 250 collaborative publications and 20 patent disclosures. Green also served as the B.F. Goodrich Professor of Materials Engineering at the University of Texas, Austin.

In addition to his academic career, Green was manager of Glass and Electronic Ceramics Research at Sandia National Laboratories and president of the Materials Research Society. Among his many honors and recognitions, he is a fellow in the American Association for the Advancement of Science, a fellow of the Royal Society of Chemistry (United Kingdom), a fellow of the American Physical Society, and a fellow of the American Ceramics Society.

He holds bachelor's and master's degrees in physics from Hunter College and a master's and doctorate in materials science and engineering from Cornell University.

Bobi A. Garrett — Chief Operating Officer and Deputy Laboratory Director

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In her role as deputy laboratory director/chief operating officer (COO) of the National Renewable Energy Laboratory (NREL), Bobi Garrett integrates laboratory strategy and execution across mission and operations.

She oversees planning and institutional performance management functions, assesses the effectiveness of business systems and infrastructure in supporting mission outcomes, and serves as the interface with DOE headquarters. She brings long-standing experience in energy research to this role.

Before she was COO at NREL, Garrett was the deputy laboratory director for Strategic Programs and Partnerships, leading the functions that connect the capabilities of the laboratory to market impact. Prior to joining NREL in 1998, Garrett also held several line management and program leadership positions at the Pacific Northwest National Laboratory in Richland, Washington.

Garrett has a bachelor's degree in chemical engineering from Montana State University and a master's from the University of Washington. She serves on the board of CO-LABS, the consortium of federally funded research institutions in Colorado; the Operational Technical Review Committee of Arizona Public Service; and as an ambassador for Clean Energy Education and Empowerment (C3E), a program under the Clean Energy Ministerial focused on attracting, retaining, and advancing women in clean energy careers.

Owen Barwell — Chief Financial Officer

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Owen Barwell leads the finance and procurement organizations and is responsible for the overall financial management of the laboratory.

Barwell has more than 25 years of experience in financial auditing, analysis, and management. He previously served as the Acting Chief Financial Officer and Deputy Chief Financial Officer of the U.S. Department of Energy (DOE), where he was directly responsible for DOE's strategic plan, budget, finance and accounting, risks and internal controls, corporate business systems, and program performance functions.

Barwell also worked for NASA as Deputy Director of the Integrated Enterprise Management Program and Senior Financial Advisor for the Office of the Administrator. Most recently, he was Managing Director at Grant Thornton, LLP. Throughout his career, Barwell has gained extensive experience in the implementation of new business systems to provide transparency for program and financial performance.

Barwell holds a bachelor's degree in economics from Lancaster University.

Steven Silbergleid — Secretary and General Counsel

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As General Counsel, Steve Silbergleid provides legal advice and counsel to the lab's director and executive management on the development and administration of policy, compliance with the prime contract, procurement and intellectual property issues, employment issues, and other legal and management concerns.

He also serves as corporate Secretary and provides counsel to the Alliance for Sustainable Energy, L.L.C. (Alliance), managing and operating contractor of NREL. Prior to his position with the Alliance and NREL, he served as Chief Counsel of the Chicago Field Office for ten plus years, as well as Chicago's Acting Chief Operations Officer.

His legal career includes over 36 years of federal service as an attorney and now includes nine plus years of service as the General Counsel of a national laboratory.

Silbergleid has a bachelor's in history, obtained his doctorate of law at St. John's University School of Law, and is admitted to practice law in the states of Colorado and New York.