Jon Keller is the team leader for wind turbine drivetrain technology at NREL. Jon leads projects ranging from the development and verification of new drivetrains with improved performance, power density, and efficiency and to in-depth research investigations of failure modes and improvement in reliability of existing drivetrains often conducted in the dynamometers or field turbines. Prior to joining NREL, Jon worked for the US Army at Redstone Arsenal, AL, for 10 years, where he developed condition monitoring systems for Army rotorcraft to reduce the cost and maintenance burdens while increasing availability and safety. His Ph.D. is in aerospace engineering from Penn State University.