Prof. Dr. John Holah is an applied microbiologist focused on the prevention of microbial, chemical, and foreign body contamination of food during manufacture and retail distribution. He is currently Technical Director of Holchem Laboratories (UK), a major supplier of cleaning chemicals, disinfectants and hygiene services. He is a Visiting Professor in Food Safety at Cardiff Metropolitan University and was previously Head of Food Hygiene at Campden BRI. He has been a member of the EHEDG (the European Hygienic Engineering and Design Group) since 1989 and has also chaired ISO Working Groups producing standards on hygienic design and lubricants and chaired the GFSI Working Group on the hygienic design of food facilities and equipment. He is a co-editor in the other two Elseveir books. He has published and presented hundreds of scientific papers, technical articles and presentations in food safety and hygienic design.