Jeff began his work in genetic toxicology when he joined Litron Laboratories in 2006 as a research scientist and is now Director of Clinical Studies. In his current position Jeff serves as principal investigator for internal research efforts, study director for sponsor-supported studies and also manages clinical investigations for clients. Jeff regularly presents at national and international meetings and is an author on over 60 peer-reviewed journal articles and book chapters. Jeff has been an active member of the Society of Toxicology for over eighteen years. He has served on the Education, Student and New Investigator Affairs committee of the Environmental Mutagen and Genomics Society for four years, and is its currently Co-Chair as well as a Council Member for EMGS, and is the representative of the New Technology Special Interest Group on the Program Committee. Jeff was also on the Board of Directors for the Genetic Toxicology Association. He served for three years on the Program Committee for the annual meeting and chaired it for the last two years. Jeff recently served as an expert working group member of the In Vitro Mammalian Gene Mutation Assays Workgroup of the International Workshops on Genotoxicity Testing.