Dr Stephan G Walch is currently the Executive Director of the CVUA Karlsruhe, which is an ISO 17025 accredited Official Food and Feed Laboratory and Official Medicines Control Laboratory of the state of Baden-Württemberg, Germany. He served as a scientist and senior scientist in different governmental laboratories in Germany in the fields of food safety, food additives, analysis and evaluation of residues and contaminants in food, feed, and water. He is also experienced in the testing of medicines and medical devices. Stephan Walch is also a lecturer at the Technische Universität Kaiserslautern and the Albstadt-Sigmaringen University and has published over 50 peer reviewed articles. He is member of the German delegation to the Codex Committee on Methods of Analysis and Sampling (CCMAS) of Codex Alimentarius and is member of the working group of food chemistry experts from the federal states and the Federal Office of Consumer Protection and Food Safety (ALS). He is currently serving on the rooster of experts of the FAO/WHO JECFA and expert committe of the Food Chemical Codex of USP . Stephan Walch is also member of several national and international working groups which focus on method standardization or standard development (such as AOAC, ISO, CEN, DIN).