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.