Ellen Tisdale was appointed Secretary in July 2017. She is a proud graduate of Tuskegee University, where she earned her bachelor of science degree in Biology. She later received master of science in Genetics from Iowa State University. Ellen started her career in Agriculture as a Data Analyst and then became a Research Scientist for Purina Animal Nutrition, which is what initially brought her to St. Louis. She currently works for Mallinckrodt Pharmaceuticals as a Senior Quality Assurance Document Coordinator, in the Regulatory Operations Division.