Dr. Todd M. Martin has been with the Office of Research and Development at the US EPA since 2002. A chemical engineer by training, his research has focused on computational toxicology and alternatives assessment. He is the lead developer of T.E.S.T. (Toxicity Estimation Software Tool). T.E.S.T. estimates toxicity values and physical properties from molecular structure. He is also the lead developer for the Hazard Comparison Dashboard (HCD). HCD is a web tool that allows users to easily compare the hazards of chemical alternatives using chemical lists, experimental toxicity data, and predicted toxicity values.