Dr. Marsden, as a world-renowned food safety expert, served as an advisor to the White House on food safety and nutrition and has testified on numerous occasions to the United States Congress, the US Food and Drug Administration (FDA), and the US Department of Agriculture (USDA). He recently served as the executive director of food safety at Chipotle where he was responsible for directing the food safety programs at Chipotle Mexican Grills, ShopHouse restaurants, and Pizzeria Locale. He was recruited into the position to bring best practices in food safety to Chipotle and push suppliers to adopt stricter policies for food safety testing. To Chipotle, he brought over forty years’ experience in the food industry working with government officials, regulators, food companies, trade associations, and academics. He previously worked for several food companies and technology providers and served as Vice President for Scientific Affairs at the American Meat Institute (AMI) and President of the AMI Foundation. Earlier in his career, he was a Professor at Kansas State University and provided expert testimony in cases involving foodborne disease outbreaks from E. coli, Salmonella, Campylobacter, Listeria monocytogenes, and Norovirus.