Keith Thomas is Founding Director of Brewlab Ltd, a specialist training provider. He taught microbiology at the University of Sunderland for twenty-six years, conducting research into brewing topics relevant to small-scale production and yeast physiology. Keith contributes to many technical and academic publications, including homebrew journals and conferences. Brian Yorston has held senior brewing positions at Vaux, Shepherd-Neame, Wadworth and Thwaites breweries. He is currently Training Manager at Brewlab, overseeing course development and delivery of accredited certificate and diploma courses. Julio Romero Johnson is a project manager at Brewlab, responsible for developing beers for clients and conducting research into specialist products such as gluten-free and low carbohydrate beers.