Dr. Timothy Held is the Chief Technology Officer at Echogen Power Systems, where he is responsible for development, maturation and transition to product of the supercritical CO2 power cycles and energy storage systems. Prior to joining Echogen in 2008, Dr. Held was with GE Aviation for 13 years, where he led the several combustor aero design groups, and was the technical leader for alternate fuels research. Dr. Held received Ph.D. in Mechanical and Aerospace Engineering from Princeton University in 1993. He has published several technical journal articles, including chapters in the AIAA book “Combustion Instabilities in Gas Turbine Engines” and “Power Engineering: Advances and Challenges”. He presently holds 41 issued U.S. patents, with several additional in process.