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Kristin L. Callahan

Kristin L. Callahan, MS
Risk Assessor
Engineers and Scientists Concerned with the Earth


Kristin L. Callahan, currently a Risk Assessor for RIDOLFI Inc. in Seattle, Washington, specializes in Superfund site investigation, exposure and toxicity analysis, and risk characterization for hazardous chemical contaminated sites. Kristin received her Master of Science in Environmental Health in 2005 from the Department of Environmental and Occupational Health Sciences, University of Washington, and her Bachelor of Science in Biology in 1993 from The College of William and Mary.

Kristin has eight years of experience as an environmental scientist, conducting human health and ecological risk assessments, aquatic and terrestrial investigations, toxicological and microbiological research, and project management. Her recent risk assessment experience includes development of a Tribal risk exposure scenario, involving interviews with community elders, for assessing potential health risks associated with using natural resources impacted by the Hanford Nuclear Reservation. Kristin presented a synopsis of the project at the Society for Environmental Toxicology and Chemistry annual conference. Prior to her work as an environmental scientist, Kristin was involved with international development in Washington D.C. after serving as a Peace Corps volunteer in South America.

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