Jason Meredith Reese FREng FRSE FInstP FIMechE (24 June 1967 – 8 March 2019 was a British engineering scientist, and Regius Professor of Engineering at the University of Edinburgh. His research was in multiscale flow systems in which the molecular or discrete nature of the fluid determines the overall fluid dynamics. A winner of the Philip Leverhulme Prize for Engineering (Leverhulme Trust), the Lord Kelvin Medal (Royal Society of Edinburgh), and a MacRobert Award (Royal Academy of Engineering) finalist, he was previously Weir Professor of Thermodynamics & Fluid Mechanics, and Head of the Mechanical & Aerospace Engineering Department, at the University of Strathclyde, Glasgow.