He qualified from Kings College Medical School in London and obtained a PhD in nerve regeneration from UCL and an MBA from Warwick Business School. He was the first plastic surgery fellow from the United Kingdom at the world famous Memorial Sloan Kettering Cancer Centre, Manhattan, New York City. Ash is the deputy editor of British Journal of Plastic Surgery (JPRAS). He is involved in pioneering research in the use of stem cell for tissue regeneration and nanoparticle for drug delivery.