Aaron is Reader in the Institute for Advanced Automotive Propulsion Systems (IAAPS) at the University of Bath, where he is theme lead for Chemical Energy Converters and teaches IC Engine Technology on the undergraduate and master’s degree programmes. His expertise lies in the analysis, simulation, and testing of turbomachinery for boosting and waste heat recovery in propulsion systems. Research includes prediction of compressor surge and transient response in heavy-duty diesel engines, organic Rankine cycle turboexpanders for vehicle waste heat recovery, electric turbocharger design, turbine modelling, and fundamental research in unsteady flow in turbocharger turbines. Aaron is a Chartered Mechanical Engineer and has more than six years of industrial experience with Caterpillar Inc. and Mitsubishi Heavy Industries, Ltd.