Candidates must have a BS (MS preferred) in Environmental Science, Toxicology, or Chemistry and 7 years of experience working in quantitative human health and/or ecological risk assessment. Candidates must have excellent writing and communication skills. Experience with data evaluation, field chemical data analysis per EPA RCRA/CERCLA protocols, statistical and geospatial presentation of chemical data, remedial investigation and remedy evaluation experience, familiarity with EPA risk assessment regulations and guidance, and knowledge of the petroleum refining industries is preferred.