2011-2020 Technical Lead- Advanced Polymer Materials, Boeing Research and Technology 2000 – 2011 Chief Technology Officer, Crosslink 1995 - 2000 Science Fellow, Monsanto/Pharmacia/Pfizer Company

2019-currrent, Scientific Director – Drug Metabolism and Pharmacokinetics, Janssen Research and Development, Johnson & Johnson 2016-2019, Director – Molecular and Investigative Toxicology, Safety Assessment, Merck. & Co. Inc.

Professor of Biochemistry; Director of MU Metabolomics Center