Dr. Stephen Ploch has worked at Covance Laboratories in Madison, WI for 13 years and is currently a staff scientist in non-clinical safety assessment. Dr. Ploch received a masters in toxicology from the University of Wisconsin-Madison in 1992, a PhD in toxicology from Duke University in 1997 and has been a diplomate of the American Board of Toxicology since 2007.  Dr. Ploch has several publications in the field of toxicology and has directed over 100 non-clinical safety assessment studies for regulatory submission.