Ewan spent the early part of his career working in industry as an analytical chemist for an executive agency of DEFRA, and a global pharmaceutical manufacturer before taking a consultancy role serving clients across the fine chemical, pharmaceutical and manufacturing sectors. Following a return to study, he received his doctorate on membrane technology in 2008 at Cranfield, where he continues to work on the development of novel membrane processes for the water sector, that foster new opportunities in energy management, process intensification and resource recovery.