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.