Tim Sandle is a chartered biologist and holds a first class honours degree in Applied Biology, a Master's degree in education, and a doctorate from Keele University in the UK. Tim has over 25 years' experience of microbiological research and biopharmaceutical processing. This includes experience of designing, validating and operating a range of microbiological tests. In addition, Tim is experienced in pharmaceutical microbiological risk assessment and investigation. Tim serves on several national and international committees relating to pharmaceutical microbiology and cleanroom contamination control (including the ISO cleanroom standards). He is a committee member of the Pharmaceutical Microbiology Interest Group (Pharmig); serves on the National Blood Service advisory cleaning and disinfection committee; and is a member of several editorials boards for scientific journals. Tim has written over 400 book chapters, peer reviewed papers and technical articles relating to microbiology.