Lewis is currently an advanced research fellow at the University of Aberdeen where he completed his PhD. In partnership with TauRx Therapeutics Ltd. and the Scottish Biologics Facility, his research is involved in the discovery and development of novel anti-tau therapeutics, immunodiagnostics and biomarkers for Alzheimer’s disease. He is a principal scientist at TauRx Therapeutics Ltd. where he is involved in clinical research and is a study lead for implementation of blood-based biomarker endpoints into Alzheimer’s disease clinical trials. He has previously worked as a study director in regulated toxicology at a global CRO.