Research Fellows
Our research fellows advise on the strategic direction of science and technology research at NREL and ensure our work meets the highest standards for quality and objectivity.
Find all research staff by visiting our research program areas.
Robert Allen
Senior Research Fellow
After 35 years as an industrial polymer chemist and research leader at IBM, Bob Allen joined NREL to focus on sustainable polymers and composites for the future circular economy.
Mowafak Al-Jassim
Senior Research Fellow
Mowafak Al-Jassim has worked at NREL for more than 30 years and has contributed greatly to world-record efficiencies in photovoltaic technologies.
Matthew Beard
Senior Research Fellow
Matt Beard serves as the director of the Center for Hybrid Organic Inorganic Semiconductors for Energy, an Energy Frontier Research Center.
Gregg Beckham
Senior Research Fellow
Gregg Beckham's research at NREL focuses on conversion of biomass to fuels, chemicals, and materials, including the areas of metabolic engineering, fermentation, separations, chemical catalysis, biopolymer production, cellulase enzyme improvements, renewable carbon fiber production, theory and simulation to design biological and chemical catalysts, and lignin valorization.
Joseph Berry
Senior Research Fellow
Joe Berry is the Perovskite and Hybrid Solar Cells Team lead and principal scientist on oxide semiconductor systems, with a focus on basic materials physics and device applications of these materials.
David S. Ginley
Senior Research Fellow
David S. Ginley's current activities are in the general class of defective transition metal oxides, including high-temperature superconductors, LiTMO2 rechargable Li battery materials, ferroelectric materials, transparent conducting oxides, and electrochromic materials.
Michael Himmel
Senior Research Fellow
Michael Himmel is a biochemist whose work on cellulase greatly simplified and lowered the cost of converting biomass to fuel. Himmel manages the award-winning cellulase enzyme technology effort.
Sarah Kurtz
Senior Research Fellow
Sarah Kurtz is a world-renowned expert in the fields of multijunction PV, concentrator PV, and PV reliability.
Robert McCormick
Senior Research Fellow
Bob McCormick’s research is focused on end-use issues and fuel-engine interactions with alternative fuels, primarily biofuels—including ethanol and biodiesel as well as next-generation and futuristic fuels.
Bryan Pivovar
Senior Research Fellow
Bryan Pivovar is the fuel cell group manager in the Chemistry and Nanosciences Center at NREL. He oversees NREL’s electrolysis and fuel cell research and development activities.
Ingrid Repins
Senior Research Fellow
Ingrid Repins is a principal scientist in the Reliability Group at NREL. She has worked for more than 20 years in state-of-the-art device and module characterization, process research, and manufacture.
Garry Rumbles
Senior Research Fellow
Garry Rumbles is widely recognized for his research in photochemistry and photophysics of conjugated molecular systems, energy conversion in organic light-emitting diodes and organic photovoltaic devices, and nanoscale morphology.
Paul Veers
Senior Research Fellow
Paul Veers is the chief engineer of the National Wind Technology Center at NREL's Flatirons Campus and manager of the Wind Energy Science Group.
Andy Walker
Senior Research Fellow
Andy Walker develops new methods for engineering and economic analysis of energy efficiency and renewable energy projects and has a patent on the Renewable Energy Optimization method of planning renewable energy projects across a portfolio of properties.
Research Fellows Emeriti
Richard Ahrenkiel
Senior Research Fellow Emeritus
Richard Ahrenkiel's area of specialization is the measurement and characterization of photovoltaic cells and materials. He is one of the world experts in the area of carrier recombination and carrier lifetime.
Helena Chum
Senior Research Fellow Emeritus
Helena Chum's expertise is in renewable fuels, transportation systems, and international renewable energy activities, including biomass, biofuels, and biorefineries.
Timothy J. Coutts
Senior Research Fellow Emeritus
Timothy Coutts' research areas include thin-film science, photovoltaics, and thermophotovoltaics.
Richard DeBlasio
Senior Research Fellow Emeritus
Dick DeBlasio is an expert in renewable electricity, end-use systems applications, and distributed energy resources.
Arthur J. Nozik
Senior Research Fellow Emeritus
Arthur Nozik's work focuses on photoelectrochemistry, solid state physics, semiconductor nanoscience, hot carrier effects, third-generation solar photon conversion, and related interdisciplinary science.
Michael Seibert
Senior Research Fellow Emeritus
Michael Seibert's research interests include primary processes of and water-oxidation in oxygenic photosynthesis, structure and function of [Fe]-hydrogenases, molecular engineering of hydrogenases, expression profiling in green algae, and photobiological hydrogen production.
Robert Thresher
Senior Research Fellow Emeritus
Robert Thresher has more than 40 years of research, development, engineering, and management experience in wind technology, plant engineering, and aerospace systems. He has been a strategist for the initiation of a national research program to develop offshore wind, wave, tidal and current energy technology.