Head of Research for the Machining Group at the University of Sheffield Advanced Manufacturing Research Centre and Professor of Subtractive Manufacturing. Active in the field of advanced subtractive manufacturing research focussing on conventional, abrasive and disruptive process technologies. Primary areas of research are concerned with: - Abrasive machining processes - Hybrid machining processes - Conventional chip formation processes - Micro machining - Machining of aerospace materials - Machining of ceramic matrix composite materials (CMCs)Research activities span technology readiness levels delivered through academic studies, PhD / EngD level research and industrial collaboration. Currently engaging in manufacturing sectors spanning aerospace, medical and defence.