Jeffrey Cohen is a Fellow in the Thermal and Fluid Sciences Department of the United Technologies Research Center (UTRC), where he is responsible for technical leadership in the company’s reacting flow projects and for the development of new programs and capabilities. Among his achievements are the development of an active feedback control system for controlling instabilities in natural gas-fueled combustors and the design and implementation of a symmetry-breaking system to attenuate combustion instabilities in aeroengine combustors. Dr. Cohen previously was an Aerodynamics Manager with the Combustor and Augmentor Advanced Technology Group at Pratt & Whitney. He first joined UTRC in 1987 as a heat transfer intern and held various positions of increasing responsibility as a research engineer, Group Leader and Project Leader. He holds six granted or pending U.S. patents and has authored two book chapters, along with over 40 archival journal papers, conference papers and invited presentations. An Associate Fellow of AIAA, Dr. Cohen has received numerous awards from UTC and was presented the AIAA Sustained Service Award (’07) as well as awards from NASA and the U.S. Air Force.